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1

Targeted class analysis of β-lactam antibiotics by tandem mass spectrometry

Michael P. Barbalas, Fred W. McLafferty, John L. Occolowitz

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1983

Language:

english

File:

PDF, 308 KB

english, 1983

2

Rearrangement ions in the mass spectrum of methyl vinyl sulphoxide

R. G. Gillis, J. L. Occolowitz, J. F. Pisani

Journal:

Journal of Mass Spectrometry

Year:

1969

Language:

english

File:

PDF, 92 KB

english, 1969

3

Isolation and structure elucidation of the major degradation products of cefaclor formed under aqueous acidic conditions

Steven W. Baertschi, Douglas E. Dorman, John L. Occolowitz, Monte W. Collins, Larry A. Spangle, Gregory A. Stephenson, Leslie J. Lorenz

Journal:

Journal of Pharmaceutical Sciences

Year:

1997

Language:

english

File:

PDF, 365 KB

english, 1997

4

Isolation and structure elucidation of the major degradation products of cefaclor in the solid state

Douglas E. Dorman, Leslie J. Lorenz, John L. Occolowitz, Larry A. Spangle, Monte W. Collins, Fadia N. Bashore, Steven W. Baertschi

Journal:

Journal of Pharmaceutical Sciences

Year:

1997

Language:

english

File:

PDF, 292 KB

english, 1997

5

Structure and absolute configuration of strictamine and strictalamine from Rhazya stricta. Stereochemistry of the Picralima alkaloids

Ahmad, Yusuf, Fatima, Kaniz, Atta-ur-Rahman,, Occolowitz, John L., Solheim, Barbara A., Clardy, Jon, Garnick, Robert L., Le Quesne, Philip W.

Journal:

Journal of the American Chemical Society

Year:

1977

Language:

english

File:

PDF, 518 KB

english, 1977

6

Structures of some of the minor aminoglycoside factors of the nebramycin fermentation

Koch, K. F., Merkel, K. E., O'Connor, S. C., Occolowitz, John L., Paschal, Jonathan W., Dorman, Douglas E.

Journal:

Journal of Organic Chemistry

Year:

1978

Language:

english

File:

PDF, 601 KB

english, 1978

7

The structures of A10255 B, -G and -J: new thiopeptide antibiotics produced by Streptomyces gardneri

Debono, Manuel, Molloy, R. Michael, Occolowitz, John L., Paschal, Jonathan W., Hunt, Ann H., Michel, Karl H., Martin, James W.

Journal:

Journal of Organic Chemistry

Year:

1992

Language:

english

File:

PDF, 1.02 MB

english, 1992

8

ChemInform Abstract: STRUCTURE AND ABSOLUTE CONFIGURATION OF STRICTAMINE AND STRICTALAMINE FROM RHAZYA STRICTA. STEREOCHEMISTRY OF THE PICRALIMA ALKALOIDS

AHMAD, Y., FATIMA, K., ATTA-UR-RAHMAN, ATTA-UR-RAHMAN, OCCOLOWITZ, J. L., SOLHEIM, B. A., CLARDY, J., GARNICK, R. L., LE QUESNE, P. W.

Journal:

Chemischer Informationsdienst

Year:

1977

File:

PDF, 111 KB

1977

9

The structure of narasin and a related ionophore

J. L. Occolowitz, D. H. Berg, M. Debono, R. L. Hamill

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1976

Language:

english

File:

PDF, 389 KB

english, 1976

10

Mass spectrometry of N-methylsulfonylureas. A re-examination

Aaron D. Kossoy, John L. Occolowitz

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1978

Language:

english

File:

PDF, 332 KB

english, 1978

11

Soil degradation of trifluralin: Mass spectrometry of products and potential products

Tomasz Golab, J. L. Occolowitz

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1979

Language:

english

File:

PDF, 692 KB

english, 1979

12

The Structure of Vincarodine

Norbert Neuss, Harold E. Boaz, John L. Occolowitz, Ernest Wenkert, F. M. Schell, Pierre Potier, Christiane Kan, M. M. Plat, M. Plat

Journal:

Helvetica Chimica Acta

Year:

1973

Language:

english

File:

PDF, 376 KB

english, 1973

13

High Performance Liquid Chromatography (HPLC.) of Natural Products. III [1]. Isolation of New Tripeptides from the Fermentation Broth of P. Chrysogenum

N. Neuss, R. D. Miller, C. A. Affolder, W. Nakatsukasa, J. Mabe, L. L. Huckstep, N. La De Higuera, A. H. Hunt, J. L. Occolowitz, J. H. Gilliam

Journal:

Helvetica Chimica Acta

Year:

1980

Language:

english

File:

PDF, 472 KB

english, 1980

14

Cephalothin: Hydrolysis of the C-3′-acetoxy moiety of a 7-aminocephalosporanic acid; observation of both acyl-oxygen bond cleavage and reversible alkyl-oxygen bond cleavage

Joseph M. Indelicato, Gary L. Engel, John L. Occolowitz

Journal:

Journal of Pharmaceutical Sciences

Year:

1985

Language:

english

File:

PDF, 537 KB

english, 1985

15

Isolation and structure elucidation of a novel product of the acidic degradation of cefaclor

Steven W. Baertschi, Douglas E. Dorman, John L. Occolowitz, Larry A. Spangle, Monte W. Collins, Marvin E. Wildfeuer, Leslie J. Lorenz

Journal:

Journal of Pharmaceutical Sciences

Year:

1993

Language:

english

File:

PDF, 564 KB

english, 1993

16

Aqueous acidic degradation of the carbacephalosporin loracarbef

Michael J. Skibic, K. Wayne Taylor, John L. Occolowitz, Monte W. Collins, John W. Paschal, Leslie J. Lorenz, Larry A. Spangle, Douglas E. Dorman, Steven W. Baertschi

Journal:

Journal of Pharmaceutical Sciences

Year:

1993

Language:

english

File:

PDF, 865 KB

english, 1993

17

Energetics of the electron-impact fragmentation of alkoxybenzenes and alkylthiobenzenes

R. G. Gillis, G. J. Long, A. G. Moritz, J. L. Occolowitz

Journal:

Journal of Mass Spectrometry

Year:

1968

Language:

english

File:

PDF, 227 KB

english, 1968

18

The ions [CH3S]+, [C2H5S]+ and [CH3O]+ formed by electron-impact

D. Amos, R. G. Gillis, J. L. Occolowitz, J. F. Pisani

Journal:

Journal of Mass Spectrometry

Year:

1969

Language:

english

File:

PDF, 224 KB

english, 1969

19

Using model ionization efficiency curves to evaluate the methods for determining appearance potentials

J. L. Occolowitz, B. J. Cerimele, Peter Brown

Journal:

Journal of Mass Spectrometry

Year:

1974

Language:

english

File:

PDF, 892 KB

english, 1974

20

Peptide and protein mapping by 252Cf-plasma desorption mass spectrometry

Anthony Tsarbopoulos, Gerald W. Becker, John L. Occolowitz, Ian Jardine

Journal:

Analytical Biochemistry

Year:

1988

Language:

english

File:

PDF, 900 KB

english, 1988

21

A90720A, a serine protease inhibitor isolated from a terrestrial blue-green alga Microchaete loktakensis

Rosanne Bonjouklian, Tim A. Smitka, Ann H. Hunt, John L. Occolowitz, Thomas J. Perun Jr., Lawrence Doolin, Stephanie Stevenson, Lisa Knauss, Ranmali Wijayaratne, Stanley Szewczyk, Gregory M.L. Patters

Journal:

Year:

1996

Language:

english

File:

PDF, 499 KB

english, 1996

22

The separation of C6C12 dibasic acids in the presence of monobasic acids: A simple procedure by paper chromatography

John L. Occolowitz

Journal:

Journal of Chromatography A

Year:

1961

Language:

english

File:

PDF, 287 KB

english, 1961

23

Steroids and related natural products—xxvii. Salvia apiana

G.R. Pettit, H. Klinger, Nels-Otto N. Jorgensen, J. Occolowitz

Journal:

Year:

1966

Language:

english

File:

PDF, 925 KB

english, 1966

24

The 2,2-dimethylchromen dimer : 2,2-diphenylchromen and related compounds

C.S. Barnes, Margaret I. Strong, J.L. Occolowitz

Journal:

Year:

1963

Language:

english

File:

PDF, 816 KB

english, 1963

25

Loss of sulphur by electron impact on aliphatic compounds

R.G. Gillis, J.L. Occolowitz

Journal:

Tetrahedron Letters

Year:

1966

Language:

english

File:

PDF, 137 KB

english, 1966

26

A83543A-D, unique fermentation-derived tetracyclic macrolides

Herbert A. Kirst, Karl H. Michel, James W. Martin, Lawrence C. Creemer, Eddie H. Chio, Raymond C. Yao, Walter M. Nakatsukasa, LaVerne D. Boeck, John L. Occolowitz, Jonathan W. Paschal, Jack B. Deeter,

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 152 KB

english, 1991

27

Electron impact fragmentation of some organotin compounds

J.L. Occolowitz

Journal:

Tetrahedron Letters

Year:

1966

Language:

english

File:

PDF, 392 KB

english, 1966

28

The structure of munetone

C.S. Barnes, J.L. Occolowitz, N.L. Dutta, P.Madhavan Nair, P.S. Phadke, K. Venkataraman

Journal:

Tetrahedron Letters

Year:

1963

Language:

english

File:

PDF, 307 KB

english, 1963

29

Vibrational frequency and band intensity of the isocyanide group

R.G. Gillis, J.L. Occolowitz

Journal:

Spectrochimica Acta

Year:

1963

Language:

english

File:

PDF, 315 KB

english, 1963

30

Isolation and characterization of 4-epi-vancosamine

Ann H. Hunt, R.Michael Molloy, Manuel Debono, John L. Occolowitz

Journal:

Tetrahedron Letters

Year:

1988

Language:

english

File:

PDF, 177 KB

english, 1988

31

ChemInform Abstract: Structure of the New Spiroketal-Macrolide A82548A.

H. A. KIRST, S. H. LARSEN, J. W. PASCHAL, J. L. OCCOLOWITZ, L. C. CREEMER, J. L. RIOS STEINER, E. LOBKOVSKY, J. CLARDY

Journal:

Year:

1996

File:

PDF, 26 KB

1996

32

ChemInform Abstract: A90720A, a Serine Protease Inhibitor Isolated from a Terrestrial Blue- Green Alga Microchaete loktakensis.

R. BONJOUKLIAN, T. A. SMITKA, A. H. HUNT, J. L. OCCOLOWITZ, T. J. JUN. PERUN, L. DOOLIN, S. STEVENSON, L. KNAUSS, R. WIJAYARATNE, S. SZEWCZYK, G. M. L. PATTERSON

Journal:

Year:

1996

File:

PDF, 28 KB

1996

33

Steroidal peptides

G. R. Pettit, A. K. Gupta, H. Klinger, J. Occolowitz

Journal:

Cellular and Molecular Life Sciences

Year:

1964

Language:

english

File:

PDF, 209 KB

english, 1964

34

Steroids and related natural products. LV. Bufadienolides. 8 12(13.far.14)abeo Skeletal rearrangements

Pettit, George R., Kasturi, Tirumalai R., Knight, John C., Occolowitz, John.

Journal:

Journal of Organic Chemistry

Year:

1970

Language:

english

File:

PDF, 1.05 MB

english, 1970

35

Cytokinins: Isolation and identification of 6-(3-methyl-2-butenylamino)-9-β-D-ribofuranosylpurine (2iPA) from yeast cysteine tRNA

S.M. Hecht, N.J. Leonard, J. Occolowitz, W.J. Burrows, D.J. Armstrong, F. Skoog, R.M. Bock, Ian Gillam, G.M. Tener

Journal:

Biochemical and Biophysical Research Communications

Year:

1969

Language:

english

File:

PDF, 265 KB

english, 1969

36

Mass spectra of diketopiperazines derived from aranotin and related metabolites

Nagarajan, R., Occolowitz, J. L., Neuss, N., Nash, S. M.

Journal:

Journal of the Chemical Society D Chemical Communications

Year:

1969

Language:

english

File:

PDF, 268 KB

english, 1969

37

Myricoside, an African armyworm antifeedant: separation by droplet countercurrent chromatography

Cooper, Raymond, Solomon, Philippa H., Kubo, Isao, Nakanishi, Koji, Shoolery, James N., Occolowitz, John L.

Journal:

Journal of the American Chemical Society

Year:

1980

Language:

english

File:

PDF, 436 KB

english, 1980

38

Mass Spectrometry in Organic and Biological Chemistry || Applications of Mass Spectrometry in Structural Studies of Bioactive Compounds

K. Nakanishi and J. L. Occolowitz

Journal:

Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences (1934-1990)

Year:

1979

Language:

english

File:

PDF, 1.08 MB

english, 1979

39

Organophosphorus compounds. VII. Electron-impact fragmentations of esters of phosphonic acids

Occolowitz, JL, Swan, JM

Journal:

Australian Journal of Chemistry

Year:

1966

Language:

english

File:

PDF, 312 KB

english, 1966

40

Conversion of antibiotic A82846B to orienticin A and structural relationships of related antibiotics

Nagarajan, Ramakrishnan, Berry, Donnis M., Hunt, Ann H., Occolowitz, John L., Schabel, Amelia A.

Journal:

Journal of Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 580 KB

english, 1989

41

Conversion of antibiotic A82846B to orienticin A and structural relationships of related antibiotics [Erratum to document cited in CA110(21):193380v]

Nagarajan, Ramakrishnan, Berry, Donnis M., Hunt, Ann H., Occolowitz, John L., Schabel, Amelia A.

Journal:

Journal of Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 78 KB

english, 1989

42

Mass Spectrometry of Naturally Occurring Alkenyl Phenols and Their Derivatives.

Occolowitz, J. L.

Journal:

Analytical Chemistry

Year:

1964

Language:

english

File:

PDF, 542 KB

english, 1964

43

Isolation and characterization of the first mitotic cycle hormone that regulates cell proliferation

Lynn, David G., Nakanishi, Koji, Patt, Steven L., Occolowitz, John L., Almeida, Sophia, Evans, Lance S.

Journal:

Journal of the American Chemical Society

Year:

1978

Language:

english

File:

PDF, 274 KB

english, 1978

44

Alkaloids of Vinca rosea. (Catharanthus roseus G. Don). XXXVII. Structure of vincathicine

Tafur, S. S., Occolowitz, J. L., Elzey, T. K., Paschal, Jonathan W., Dorman, Douglas E.

Journal:

Journal of Organic Chemistry

Year:

1976

Language:

english

File:

PDF, 594 KB

english, 1976

45

Isolation and identification of a polar sulfamethazine metabolite from swine tissue

Giera, Deborah D., Abdulla, Riaz F., Occolowitz, John L., Dorman, Douglas E., Mertz, James L., Sieck, Robert F.

Journal:

Journal of Agricultural and Food Chemistry

Year:

1982

Language:

english

File:

PDF, 1.25 MB

english, 1982

46

Metastable ion intensities and the comparison of ionic structure

Occolowitz, John L.

Journal:

Journal of the American Chemical Society

Year:

1969

Language:

english

File:

PDF, 464 KB

english, 1969

47

M43 antibiotics: methylated vancomycins and unrearranged CDP-I analogs

Nagarajan, Ramakrishnan., Merkel, Kurt E., Michel, Karl H., Higgins, Harvey M., Hoehn, Marvin M., Hunt, Ann H., Jones, Noel D., Occolowitz, John L., Schabel, Amelia A., Swartzendruber, John K.

Journal:

Journal of the American Chemical Society

Year:

1988

Language:

english

File:

PDF, 286 KB

english, 1988

48

Metabolism of monensin in the steer and rat

Donoho, A., Manthey, J., Occolowitz, J., Zornes, L.

Journal:

Journal of Agricultural and Food Chemistry

Year:

1978

Language:

english

File:

PDF, 723 KB

english, 1978

49

Nature of compounds uniformly labeled with radiocarbon in a benzene ring

McMahon, Robert E., Occolowitz, John L.

Journal:

Journal of Agricultural and Food Chemistry

Year:

1969

Language:

english

File:

PDF, 2.41 MB

english, 1969

50

The mass spectra of some naturally occurring oxygen heterocycles and related compounds

Barnes, CS, Occolowitz, JL

Journal:

Australian Journal of Chemistry

Year:

1964

Language:

english

File:

PDF, 366 KB

english, 1964