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1

Carbon-13 n.m.r. study of naturally occurring xanthones

Philip W. Westerman, Sarath P. Gunasekera, M. Uvais, S. Sultanbawa, Rymantas Kazlauskas

Journal:

Magnetic Resonance in Chemistry

Year:

1977

Language:

english

File:

PDF, 487 KB

english, 1977

2

13C nuclear magnetic resonance spectra of some naturally occurring friedelanones

A. A. Leslie Gunatilaka, N. P. Dhammika Nanayakkara, M. Uvais S. Sultanbawa, Mohammed I. M. Wazeer

Journal:

Magnetic Resonance in Chemistry

Year:

1980

Language:

english

File:

PDF, 288 KB

english, 1980

3

13C NMR studies of some lupane and taraxerane triterpenes

Roshan C. Carpenter, Subramaniam Sotheeswaran, M. Uvais S. Sultanbawa, B. Ternai

Journal:

Magnetic Resonance in Chemistry

Year:

1980

Language:

english

File:

PDF, 362 KB

english, 1980

4

Assignment of the 13C nuclear magnetic resonance spectra of three 27-hydroxyfriedelanes

A. A. Leslie Gunatilaka, N. P. Dhammika Nanayakkara, M. Uvais S. Sultanbawa, Mohamed I. M. Wazeer

Journal:

Magnetic Resonance in Chemistry

Year:

1982

Language:

english

File:

PDF, 132 KB

english, 1982

5

Cycloartenyl acetate, cycloartenol and cycloartenone in the bark of Artocarpus species

Gowsala Pavanasasivam, M. Uvais, S. Sultanbawa

Journal:

Year:

1973

Language:

english

File:

PDF, 174 KB

english, 1973

6

Triterpenes of five euphorbiaceae species of Sri Lanka

Roshan C. Carpenter, Subramaniam Sotheeswaran, M. Uvais, S. Sultanbawa, Sinnathamby Balasubramaniam

Journal:

Year:

1980

Language:

english

File:

PDF, 410 KB

english, 1980

7

Xanthones and triterpenes of Calophyllum tomentosum

Subadra Karunanayake, Subramanian Sotheeswaran, M. Uvais, S. Sultanbawa, Sinnathamby Balasubramaniam

Journal:

Year:

1981

Language:

english

File:

PDF, 214 KB

english, 1981

8

Friedelin, D:A-friedo-olean-3,21-dione and 21α-hydroxy-D:A-friedo-olean-3-one from Kokoona zeylanica

A.A. Leslie Gunatilaka, N.P. Dhammika Nanayakkara, M. Uvais, S. Sultanbawa, Sinnathamby Balasubramaniam

Journal:

Year:

1982

Language:

english

File:

PDF, 291 KB

english, 1982

9

Triterpenes from Gymnosporia emarginata

Dharmassree B.T. Wijeratne, Vijaya Kumar, M. Uvais, S. Sultanbawa, Sinnathamby Balasubramaniam

Journal:

Year:

1982

Language:

english

File:

PDF, 184 KB

english, 1982

10

3,5,7,3′,5′-Pentahydroxyflavan and 3α-methoxyfriedelan from Humboldtia laurifolia

Upasiri Samaraweera, Subramaniam Sotheeswaran, M. Uvais, S. Sultanbawa

Journal:

Year:

1983

Language:

english

File:

PDF, 263 KB

english, 1983

11

Two pyranodihydrobenzoxanthones from Artocarpus nobilis

M. Uvais, S. Sultanbawa, Sivagnanasundram Surendrakumar

Journal:

Year:

1989

Language:

english

File:

PDF, 548 KB

english, 1989

12

The structure of zeylasterone - the first of a new series of phenolic 24-nor-D:A-friedo-oleanan triterpenes

G.M. Kamal, B. Gunaherath, A.A. Leslie Gunatilaka, M. Uvais, S. Sultanbawa, Mohamed I.M. Wazeer

Journal:

Tetrahedron Letters

Year:

1980

Language:

english

File:

PDF, 229 KB

english, 1980

13

Pachyovatamine, a bisbenzylisoquinoline alkaloid, and other alkaloids from Pachygone ovata

M. Uvais, S. Sultanbawa, Subramaniam Sotheeswaran, Sinnathamby Balasubramaniam, Moustafa Abd El-kawi, David J. Slatkin, Paul L. Schiff Jr.

Journal:

Year:

1985

Language:

english

File:

PDF, 544 KB

english, 1985

14

Another antibacterial polyphenol, copalliferol B, from Vateria copallifera (dipterocarpaceae)

Y.A.Geewananda P. Gunawardena, Subramaniam Sotheeswaran, M.Uvais S. Sultanbawa, Sivagnanasunderam Surendrakumar, Peter Bladon

Journal:

Year:

1986

Language:

english

File:

PDF, 217 KB

english, 1986

15

Distichol an antibacterial polyphenol from Shorea disticha

M.Uvais S. Sultanbawa, Sivagnanasundram Surendrakumar, Peter Bladon

Journal:

Year:

1987

Language:

english

File:

PDF, 275 KB

english, 1987

16

Triterpenoids and steroids of some Sapotaceae and their chemotaxonomic significance

Sarath P. Gunasekera, Vijaya Kumar, M.Uvais S. Sultanbawa, Sinnathamby Balasubramaniam

Journal:

Year:

1977

Language:

english

File:

PDF, 548 KB

english, 1977

17

Triterpenoid, coumarin and quinone constituents of eleven Diospyros species (Ebenaceae)

W.H.M.Wimalaseela Herath, Nimal D.S. Rajasekera, M.Uvais S. Sultanbawa, G.Percy Wannigama, Sinnathamby Balasubramaniam

Journal:

Year:

1978

Language:

english

File:

PDF, 254 KB

english, 1978

18

Triterpenoid taxonomic markers for Stemonoporus and other genera of the dipterocarpaceae

Wickramasinghe M. Bandaranayake, Subadra Karunanayake, Subramaniam Sotheeswaran, M.Uvais S. Sultanbawa, Sinnathamby Balasubramaniam

Journal:

Year:

1977

Language:

english

File:

PDF, 371 KB

english, 1977

19

Three hydroxy ellagic acid methyl ethers, chrysophanol and scopoletin from Shorea worthingtonii and Vatica obscura

Y.A. Geevananda, P. Gunawardana, N.Savitri Kumar, M.Uvais S. Sultanbawa

Journal:

Year:

1979

Language:

english

File:

PDF, 400 KB

english, 1979

20

Structure of a bipyridine alkaloid from Broussonetia zeylanica

A.A. Leslie Gunatilaka, M. Uvais, S. Sultanbawa, Sivagnanasundram Surendrakumar, Ratnaswamy Somanathan

Journal:

Year:

1983

Language:

english

File:

PDF, 318 KB

english, 1983

21

Two new angular methyl dioxygenated D:A-fried-oleananes

Gamini Weeratunga, Vijaya Kumar, M. Uvais S. Sultanbawa

Journal:

Tetrahedron Letters

Year:

1982

Language:

english

File:

PDF, 132 KB

english, 1982

22

Structures of kokzeylanol and kokzeylanonol two new natural tri- and tetra- oxygenated D:A-friedo-oleananes

A.A.Leslie Gunatilaka, N.P.Dhammika Nanayakkara, M. Uvais, S. Sultanbawa

Journal:

Tetrahedron Letters

Year:

1981

Language:

english

File:

PDF, 200 KB

english, 1981

23

Calozeylanic acid, a new bark acid from three calophyllum species (guttiferae)

Upasiri Samaraweera, Subramaniam Sotheeswaran, M. Uvais, S. Sultanbawa

Journal:

Tetrahedron Letters

Year:

1981

Language:

english

File:

PDF, 204 KB

english, 1981

24

Structures of three new 6β-hydroxy di- and tri-oxygenated friedelane triterpenes from kokoona zeylanica thw. (celastraceae)

A.A.Leslie Gunatilaka, N.P.Dhammika Nanayakkara, M.Uvais S. Sultanbawa

Journal:

Tetrahedron Letters

Year:

1979

Language:

english

File:

PDF, 229 KB

english, 1979

25

Xanthones and 4-phenylcoumarins of Mesua thwaitesii

Wickramasinghe M. Bandaranayake, Sathiaderan S. Selliah, M.Uvais S. Sultanbawa, D.E. Games

Journal:

Year:

1975

Language:

english

File:

PDF, 513 KB

english, 1975

26

Flavonoids of some dilleniaceae species

Gowsala Pavanasasivam, M.Uvais S. Sultanbawa

Journal:

Year:

1975

Language:

english

File:

PDF, 162 KB

english, 1975

27

Biflavonoids and xanthones of Garcinia terpnophylla and G. Echinocarpa

Wickramasinghe M. Bandaranayake, Sathiadevan S. Selliah, M.Uvais S. Sultanbawa, W. Davii Ollis

Journal:

Year:

1975

Language:

english

File:

PDF, 317 KB

english, 1975

28

Distribution of some triterpenes and phenolic compounds in the extractives of endemic dipterocarpaceae species of Sri Lanka

Y.A. Geevananda, P. Gunawardana, M.Uvais S. Sultanbawa, S. Balasubramaniam

Journal:

Year:

1980

Language:

english

File:

PDF, 381 KB

english, 1980

29

Polyphenols from Stemonoporus species

Upasiri Samaraweera, Subramaniam Sotheeswaran, M.Uvais S. Sultanbawa

Journal:

Year:

1982

Language:

english

File:

PDF, 295 KB

english, 1982

30

1,2(3)-Tetrahydro-3,3′-biplumbagin: A naphthalenone and other constituents from Plumbago zeylanica

G.M.Kamal B. Gunaherath, A.A.Leslie Gunatilaka, M.Uvais S. Sultanbawa, S. Balasubramaniam

Journal:

Year:

1983

Language:

english

File:

PDF, 320 KB

english, 1983

31

Three new ursene carboxylic acids from Uncaria thwaitesii

W.H.M.Wimalaseela Herath, M.Uvais S. Sultanbawa, G.Percy Wannigama

Journal:

Year:

1978

Language:

english

File:

PDF, 346 KB

english, 1978

32

Chemical investigation of ceylonese plants. Part 21. Extractives of Pentadesma butyracea Sabine (Guttiferae)

Gunasekera, Sarath P., Sivapalan, Kanapathipillai, Sultanbawa, M. Uvais S., Ollis, W. David

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 535 KB

english, 1977

33

Structures of four new oxygenated lupanes from Pleurostylia opposita(Celastraceae)

Dantanarayana, Anura P., Kumar, N. Savitri, Sultanbawa, M. Uvais S., Balasubramaniam, Sinnathamby

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1981

Language:

english

File:

PDF, 933 KB

english, 1981

34

Dulcitol and (-)4'-O-Methylepigallocateehin From Kokoona zeylanica

Kamal, G. M., Gunaherath, B., Gunatilaka, A. A. Leslie, Sultanbawa, M. Uvais S., Balasubramaniam, Sinnathamby

Journal:

Journal of Natural Products

Year:

1982

Language:

english

File:

PDF, 228 KB

english, 1982

35

Chemical investigation of ceylonese plants. Part VIII. Trapezifolixanthone, a new di-isoprenylated xanthone from the bark of Calophyllum trapezifolium Thw. (Guttiferae)

Somanathan, Ratnaswamy, Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1974

Language:

english

File:

PDF, 373 KB

english, 1974

36

Polyphenols from dipterocarp species. Vaticaffinol and ?-viniferin

Sotheeswaran, Subramaniam, Sultanbawa, M. Uvais S., Surendrakumar, Sivagnanasundram, Balasubramaniam, Sinnathamby, Bladon, Peter

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1985

Language:

english

File:

PDF, 505 KB

english, 1985

37

Chemical investigation of ceylonese plants. Part 22. Extractives of Trichadenia zeylanica Thw. (Flacourtiaceae); isolation and structures of six new triterpenoids containing the friedelane skeleton

Gunasekera, Sarath P., Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 985 KB

english, 1977

38

Chemical investigation of ceylonese plants. Part 27. Extractives of Calophyllum cuneifolium Thw. and Calophyllum soulattri Burm. f. (Guttiferae)

Gunasekera, Sarath P., Jayatilake, Gamini S., Selliah, Sathiadevan S., Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 946 KB

english, 1977

39

Novel resveratrol tetramer, vaticaffinol, from Vatica affinis Thw. (dipterocarpaceae)

Sultanbawa, M. Uvais S., Surendrakumar, Sivaguanasundram, Wazeer, Mohamed I. M., Bladon, Peter

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1981

Language:

english

File:

PDF, 186 KB

english, 1981

40

Irradiation of friedelan-21-ones: structure determination of novel friedelane triterpenes from kokoona zeylanica

Gunatilaka, A. A. Leslie, Nanayakkara, N. P. Dhammika, Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1979

Language:

english

File:

PDF, 226 KB

english, 1979

41

A stereospecific route to trisubstituted olefins via?-lactones

Mageswaran, Sivapathasuntharam, Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1976

Language:

english

File:

PDF, 1.03 MB

english, 1976

42

Chemical investigation of ceylonese plants. Part XII. (+)-3,4?,5,7-Tetrahydroxy-3?-methoxyflavanone [(+)-dihydroisorhamnetin] and 3,5,7-trihydroxy-3?,4?-dimethoxyflavone (dillenetin): two new natural products from Dillenia indica L.

Pavanasasivam, Gowsala, Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1975

Language:

english

File:

PDF, 249 KB

english, 1975

43

Chemical investigation of Ceylonese plants. Part 20. Extractives of Mesua myrtifolia. Isolation and structure of a new triterpene hydroxy-acid, myrtifolic acid

Gunasekera, Sarath P., Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 659 KB

english, 1977

44

Chemical investigation of ceylonese plants. Part 24. New chromenoflavonoids from the bark of Artocarpus nobilis Thw. (Moraceae)

Kumar, N. Savitri, Pavanasasivam, Gowsala, Sultanbawa, M. Uvais S., Mageswaran, Rajeswari

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 1.09 MB

english, 1977

45

Chemical investigation of ceylonese plants. Part XVI. Extractives of Calophyllum cordato-oblongum Thw. (Guttiferae)

Gunasekera, Sarath P., Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1975

Language:

english

File:

PDF, 800 KB

english, 1975

46

Chemical investigation of ceylonese plants. Part XVII. Isolation and structures of the xanthones in the extractives of Mesua ferrea L. (form M. salicina Pl. and Tr.)(Guttiferae)

Gunasekera, Sarath P., Ramachandran, Samyiyah, Selliah, Sathiadevan, Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1975

Language:

english

File:

PDF, 608 KB

english, 1975

47

Chemical investigation of ceylonese plants. Part 23. Extractives of Hydnocarpus octandra Thw. (Flacourtiaceae); isolation and characterisation of six new triterpenoids

Gunasekera, Sarath P., Sultanbawa, M. Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1977

Language:

english

File:

PDF, 740 KB

english, 1977

48

Chemical investigation of Ceylonese plants. Part XV. Extractives of Kayea stylosa Thw. (Guttiferae)

Gunasekera, Sarath P., Selliah, Sathiadevan, Sultanbawa, M.Uvais S.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1975

Language:

english

File:

PDF, 834 KB

english, 1975

49

New antibacterial polyphenol, copalliferol A, from Vateria copallifera(retz.) alston (dipterocarpaceae)

Sultanbawa, M. Uvais S., Surendrakumar, Sivagnanasundram, Bladon, Peter

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1980

Language:

english

File:

PDF, 173 KB

english, 1980

50

Polyphenols from dipterocarp species. Copalliferol A and stemonoporol

Sotheeswaran, Subramaniam, Sultanbawa, M. Uvais S., Surendrakumar, Sivagnanasundram, Bladon, Peter

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1983

Language:

english

File:

PDF, 412 KB

english, 1983

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