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1

Volatile Constituents from the Flowers of Spathodea campanulata from the Venezuelan Andes

Villarreal, Silvana, Jaimez, Deisy, Moreno, Sindy, Rojas, Luis B., Usubillaga, Alfredo, Rodríguez, María

Journal:

Natural Product Communications

Year:

2015

File:

PDF, 263 KB

2015

2

Lignans fromKrameria ixina

Hans Achenbach, Wolfgang Utz, Alfredo Usubillaga, Henry A. Rodriguez

Journal:

Year:

1991

Language:

english

File:

PDF, 370 KB

english, 1991

3

Rhodium catalyzed hydroformylation of kaurane derivatives: A route to new diterpenes with potential bioactivity

Andreia F. Peixoto, Daniela S. de Melo, Tânia F. Fernandes, Yuraima Fonseca, Elena V. Gusevskaya, Artur M.S. Silva, Ricardo R. Contreras, Marisela Reyes, Alfredo Usubillaga, Eduardo N. dos Santos, Mar

Journal:

Applied Catalysis A: General

Year:

2008

Language:

english

File:

PDF, 673 KB

english, 2008

4

Steroidal alkaloids from Solanum sycophanta

Alfredo Usubillaga, Ieman Aziz, Maria C. Tettamanzi, Reiner Waibel, Hans Achenbach

Journal:

Year:

1997

Language:

english

File:

PDF, 530 KB

english, 1997

5

Synthesis of new extended surfactants containing a carboxylate or sulfate polar group

Alvaro Fernández, Cesar Scorzza, Alfredo Usubillaga, Jean-Louis Salager

Journal:

Journal of Surfactants and Detergents

Year:

2005

Language:

english

File:

PDF, 146 KB

english, 2005

6

Synthesis of new extended surfactants containing a xylitol polar group

Alvaro Fernández, Cesar Scorzza, Alfredo Usubillaga, Jean-Louis Salager

Journal:

Journal of Surfactants and Detergents

Year:

2005

Language:

english

File:

PDF, 791 KB

english, 2005

7

Steroidal saponins from the fruits of Solanum torvum

Pérez Colmenares, Alida, Rojas, Luis B., Mitaine-Offer, Anne-Claire, Pouységu, Laurent, Quideau, Stéphane, Miyamoto, Tomofumi, Tanaka, Chiaki, Paululat, Thomas, Usubillaga, Alfredo, Lacaille-Dubois, M

Journal:

Year:

2013

Language:

english

File:

PDF, 258 KB

english, 2013

8

Chemical Composition and Antibacterial Activity of Origanum majorana L. Essential Oil from the Venezuelan Andes

Ramos, Sulymar, Rojas, Luis B., Lucena, Maria Eugenia, Meccia, Gina, Usubillaga, Alfredo

Journal:

Journal of Essential Oil Research

Year:

2011

Language:

english

File:

PDF, 530 KB

english, 2011

9

Volatile Constituents from the Flowers of Spathodea campanulata from the Venezuelan Andes

Villarreal, Silvana, Jaimez, Deisy, Moreno, Sindy, Rojas, Luis B., Usubillaga, Alfredo, Rodríguez, María

Journal:

Natural Product Communications

Year:

2015

Language:

english

File:

PDF, 263 KB

english, 2015

10

Composition of the essential oil of Satureja brownei (SW.) Briq. from Venezuela

Luis B. Rojas, Alfredo Usubillaga

Journal:

Flavour and Fragrance Journal

Year:

2000

Language:

english

File:

PDF, 82 KB

english, 2000

11

Chemical composition of the essential oils of exudates from Pinus oocarpa Schiede

Jesús Velásquez, María E Toro, Osvaldo Encinas, Luis Rojas, Alfredo Usubillaga

Journal:

Flavour and Fragrance Journal

Year:

2000

Language:

english

File:

PDF, 57 KB

english, 2000

12

ChemInform Abstract: 3α-Hydroxytirucalla-7,24-dien-21-oic Acid: A Triterpene from Protium crenatum Sandwith

Asiloe J. Mora, Gerzon Delgado, Graciela Diaz de Delgado, Alfredo Usubillaga, Nancy Khouri, Ali Bahsas

Journal:

Year:

2001

File:

PDF, 29 KB

2001

13

Study of the essential oils from the leaves and flowers of Lepechinia conferta (Benth) Epl.

Rebeca Borges, Luis B. Rojas, Jesús A. Cegarra, Alfredo Usubillaga

Journal:

Flavour and Fragrance Journal

Year:

2006

Language:

english

File:

PDF, 68 KB

english, 2006

14

Analysis of kaurenic acids methyl esters by gas chromatography

Elysabeth Viloria, Luis Rojas, Alfredo Usubillaga

Journal:

Journal of Separation Science

Year:

1997

Language:

english

File:

PDF, 157 KB

english, 1997

15

Synthesis, stereochemical analysis, and neuromuscular blocking activity of oximino ether derivatives of progesterone

Nancy Khouri, Alfredo Usubillaga, Sarah Cedillo Vaz, Jaime N. Delgado

Journal:

Journal of Pharmaceutical Sciences

Year:

1991

Language:

english

File:

PDF, 440 KB

english, 1991

16

Solaquidine, a new steroidal alkaloid from Solanum pseudoquina

Alfredo Usubillaga, Gisela de Castellano, Judith Hidalgo, Carmela Guevara, Pablo Martinod, Alfredo Paredes

Journal:

Year:

1977

Language:

english

File:

PDF, 193 KB

english, 1977

17

Andesgenin, a new steroid sapogenin from Solanum hypomalacophyllum

Antonio G. González, Cosme G. Francisco, Raimundo Freire, Rosendo Hernández, José A. Salazar, Ernesto Suárez, Antonio Morales, Alfredo Usubillaga

Journal:

Year:

1975

Language:

english

File:

PDF, 321 KB

english, 1975

18

Rearrangements of methyl 9β-hydroxy-11-oxo-(−)-kauran-19-oate to diterpene skeletons with new ring systems

Tatsuhiko Nakano, Maria Aracelis Maillo, Alfredo Usubillaga, Andrew T. McPhail, Donald R. McPhail

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 245 KB

english, 1991

19

Synthesis of chacotriose analogues

Vincent Lequart, Gérard Goethals, Alfredo Usubillaga, Pierre Villa, Roméo Cecchelli, Patrick Martin

Journal:

Carbohydrate Research

Year:

2004

Language:

english

File:

PDF, 296 KB

english, 2004

20

Synthesis of peracetylated chacotriose

Marielba Morillo, Vincent Lequart, Eric Grand, Gérard Goethals, Alfredo Usubillaga, Pierre Villa, Patrick Martin

Journal:

Carbohydrate Research

Year:

2001

Language:

english

File:

PDF, 181 KB

english, 2001

21

Sapogenins from Solanum meridense

Brigita de Valeri, Alfredo Usubillaga

Journal:

Year:

1989

Language:

english

File:

PDF, 306 KB

english, 1989

22

Essential oil of Coespeletia timotensis Cuatrec

Luis B. Rojas, Alfredo Usubillaga, Federico Galarraga

Journal:

Year:

1999

Language:

english

File:

PDF, 97 KB

english, 1999

23

Toxicological effects of α-solamargine in experimental animals

Lina Al Chami, Ramón Méndez, Bernardo Chataing, James O'Callaghan, Alfredo Usubillaga, Luis LaCruz

Journal:

Phytotherapy Research

Year:

2003

Language:

english

File:

PDF, 93 KB

english, 2003

24

Isolation of Plumieride fromPlumeria inodora

Micheline Grignon-Dubois, Bernadette Rezzonico, Alfredo Usubillaga, Luis B. Vojas

Journal:

Chemistry of Natural Compounds

Year:

2005

Language:

english

File:

PDF, 18 KB

english, 2005

25

Cytotoxic and apoptosis-inducing effect of ent-15-oxo-kaur-16-en-19-oic acid, a derivative of grandiflorolic acid from Espeletia schultzii

Yarimar Ruiz, Juan Rodrígues, Francisco Arvelo, Alfredo Usubillaga, Mariugenia Monsalve, Nardy Diez, Iván Galindo-Castro

Journal:

Year:

2008

Language:

english

File:

PDF, 288 KB

english, 2008

26

Effect of Solanum Glycoalkaloids on Potato Aphid, Macrosiphum euphorbiae: Part II

Carlos Güntner, Álvaro Vázquez, Gabriel González, Alfredo Usubillaga, Fernando Ferreira, Patrick Moyna

Journal:

Journal of Chemical Ecology

Year:

2000

Language:

english

File:

PDF, 73 KB

english, 2000

27

Volatile Constituents from the Leaves of Three Coespeletia Species from the Venezuelan Andes

Aparicio, Rosa, Romero, Marianella, Khouri, Nancy, Rojas, Luis B., Usubillaga, Alfredo

Journal:

Journal of Essential Oil Research

Year:

2002

Language:

english

File:

PDF, 258 KB

english, 2002

28

Steroidal Sapogenins from Solanum scorpioideum

Usubillaga, Alfredo N., Meccia, Gina

Journal:

Journal of Natural Products

Year:

1987

Language:

english

File:

PDF, 401 KB

english, 1987

29

Studies on Rearrangements in Derivatives of Grandiflorenic Acid, Part 2. Synthesis of Methyl (-)-20-Norkaur-9α-Methyl-5(10), 16-Dien-19-Oate, A New Tetracyclic Rosane-Type Diterpene

Nakano, Tatsuhiko, Martín, Alfonso, Usubillaga, Alfredo

Journal:

Journal of Natural Products

Year:

1986

Language:

english

File:

PDF, 264 KB

english, 1986

30

Structure of solaphyllidine, a novel 4-ketosteroidal alkaloid

Usubillaga, Alfredo., Seelkopf, Carl., Karle, Isabella L., Daly, John W., Witkop, B.

Journal:

Journal of the American Chemical Society

Year:

1970

Language:

english

File:

PDF, 216 KB

english, 1970

31

On the Synthesis of 4-Keto-Steroidal Alkaloids

Viloria, Elizabeth, Meccia, Gina, Usubillaga, Alfredo N.

Journal:

Journal of Natural Products

Year:

1992

Language:

english

File:

PDF, 604 KB

english, 1992

32

Volatile Constituents from the Aerial Parts of Salvia angulata H.B.K. of Venezuela

Colmenares, Nélida G., Medina, Eymar García, Usubillaga, Alfredo

Journal:

Journal of Essential Oil Research

Year:

2006

Language:

english

File:

PDF, 92 KB

english, 2006

33

Preferred Conformation of a New Ring B-Homo Diterpene, Rearrangement Product of Methyl 9α-Hydroxy-11α-Methanesulfonyloxy-(-)-Kauran-19-oate

Nakano, Tatsuhiko, Maillo, María Aracelis, Usubillaga, Alfredo, Troconis, Mary Cordero De

Journal:

Natural Product Letters

Year:

1995

Language:

english

File:

PDF, 310 KB

english, 1995

34

On the Configuration of Solaquidine

Meccia, Gina, Usubillaga, Alfredo N.

Journal:

Journal of Natural Products

Year:

1987

Language:

english

File:

PDF, 285 KB

english, 1987

35

Acnistins, a new class of steroidal lactones from Acnistus ramiflorum Miers; X-ray structure of acnistin E

Usubillaga, Alfredo, de Castellano, G., Zabel, V., Watson, William H.

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1980

Language:

english

File:

PDF, 210 KB

english, 1980

36

Rearrangement of Methyl 9β-hydroxy-(11)-oxo-(-)-kauran-19-oate to a New Skeletal Ring b Aromatic Diterpene with Boron Trifluoride- Etherate and Acetic Anhydride. Proof to its Mechanistic Pathway

Nakano, Tatsuhiko, Maillo, Maria Aracelis, Usubillaga, Alfredo

Journal:

Natural Product Letters

Year:

1994

Language:

english

File:

PDF, 231 KB

english, 1994

37

Chemical Composition and Antibacterial Activity of the Essential Oil of Coleus amboinicus Lour., Against Enteric Pathogens

Velasco, Judith, Rojas, Luis B., Díaz, Tulia, Usubillaga, Alfredo

Journal:

Journal of Essential Oil Bearing Plants

Year:

2009

Language:

english

File:

PDF, 81 KB

english, 2009

38

Essential Oil Composition of Hydrocotyle umbellata L. From Venezuela

Rojas, Luis B., Usubillaga, Alfredo, Rondón, Jesús, Vit, Patricia

Journal:

Journal of Essential Oil Research

Year:

2009

Language:

english

File:

PDF, 117 KB

english, 2009

39

Chemical Composition and Bioactivity on Bacteria and Fungi of the Essential Oil from Lippia origanoides H.B.K.

Chataing, Bernardo, Rojas, Luis, Usubillaga, Alfredo, Mora, Daysi

Journal:

Journal of Essential Oil Bearing Plants

Year:

2012

Language:

english

File:

PDF, 72 KB

english, 2012

40

Composition of Essential Oil from the Leaves of Acnistus arborescens (L) Schlecht from the Venezuelan Andes

Saavedra, Agni, Rojas, Luis B., Chataign, Bernardo, Usubillaga, Alfredo

Journal:

Journal of Essential Oil Bearing Plants

Year:

2008

Language:

english

File:

PDF, 56 KB

english, 2008

41

Essential Oil of the Leaves from Espeletia batata Cuatrec

Usubillaga, Alfredo, Khouri, Nancy, Rojas, Luis B., Morillo, Marielba

Journal:

Journal of Essential Oil Research

Year:

2001

Language:

english

File:

PDF, 149 KB

english, 2001

42

Rearrangements of Derivatives of Methyl 9,11-Dihydroxy-(-)-Kauran-19-Oate to New Skeletal Diterpenes

Nakano, Tatsuhiko, Maillo, Maria Aracelis, Usubillaga, Alfredo, McPhail, Andrew T., McPhail, Donald R.

Journal:

Natural Product Letters

Year:

1993

Language:

english

File:

PDF, 299 KB

english, 1993

43

Volatile Constituents from the Leaves of Espeletia semiglobulata Cuatrec.

Usubillaga, Alfredo, Khouri, Nancy, Visbal, Tomas

Journal:

Journal of Essential Oil Research

Year:

1999

Language:

english

File:

PDF, 129 KB

english, 1999

44

Chemical Composition and Bioactivity on Bacteria and Fungi of the Essential Oil from Lippia micromera Schauer

Rojas, Luis B., Mora, Daysi, Chataing, Bernardo, Guerrero, Balmore, Usubillaga, Alfredo

Journal:

Journal of Essential Oil Bearing Plants

Year:

2009

Language:

english

File:

PDF, 72 KB

english, 2009

45

Comparative Study of the Chemical Composition of the Essential Oil of Vismia baccifera var. dealbata (Guttiferae) Collected in two Different Locations in Merida-Venezuala

Buitrago, Alexis, Rojas, Luis B., Rojas, Janne, Buitrago, Diolimar, Usubillaga, Alfredo, Morales, Antonio

Journal:

Journal of Essential Oil Bearing Plants

Year:

2009

Language:

english

File:

PDF, 59 KB

english, 2009

46

Essential Oil of Minthostachys mollis Grisebach from Venezuela

Rojas, Luis B., Usubillaga, Alfredo N.

Journal:

Journal of Essential Oil Research

Year:

1995

Language:

english

File:

PDF, 162 KB

english, 1995

47

Studies on rearrangements in derivatives of grandiflorenic acid. Part 1. Reaction of the epoxides of methyl (?)-kaur-9(11)-en-19-oate and (?)-kaur-9(11)-en-19-oic acid with boron trifluoride-diethyl ether either in the absence or in the presence of N-nitrosomethylurea. Formation of two diterpenes of a new skeletal type

Nakano, Tatsuhiko, Spinelli, Antonieta Castaldi, Mart�n, Alfonso, Usubillaga, Alfredo, McPhail, Andrew T., Onan, Kay D.

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1985

Language:

english

File:

PDF, 670 KB

english, 1985

48

Chemical composition of essential oil of Apis mellifera propolis from Falcon State, Venezuela

Rios, Nurby, Yanez, Carlos, Rojas, Luis, Mora, Flor, Usubillaga, Alfredo, Vit, Patricia

Journal:

Emirates Journal of Food and Agriculture

Year:

2014

Language:

english

File:

PDF, 100 KB

english, 2014

49

Chemical Composition of the Essential Oil from Carramboa littlei (Asteraceae)

de Rojas, Yndra Cordero, Rojas, Luis B., Usubillaga, Alfredo

Journal:

Natural Product Communications

Year:

2011

File:

PDF, 206 KB

2011

50

The Volatile Constituents of Salvia leucantha

Rojas, Luis B., Visbal, Tomas, Morillo, Marielba, de Rojas, Yndra Cordero, Arzola, Juan Carmona, Usubillaga, Alfredo

Journal:

Natural Product Communications

Year:

2010

Language:

english

File:

PDF, 235 KB

english, 2010