Abstract: Compounds useful in the inhibition of HIV integrase, the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines are described. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described. The culture Cytospora sp. MF 6608 (ATCC PTA-1691) is also disclosed, as well as processes for making a compound of the present invention employing the culture.

Abstract: Natural products such as certain chaetochromins are described. These compounds are useful in the inhibition of HIV integrase, the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.

Abstract: Compounds useful in the inhibition of HIV integrase, the prevention or treatment of infection by HV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines are described. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described. The culture Cytospora sp. MF 6608 (ATCC PTA-1691) is also disclosed, as well as processes for making a compound of the present invention employing the culture.

Abstract: Natural products such as certain dimerized hydroxyphenylundecanes are described. These compounds are useful in the inhibition of HIV integrase, the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.

Abstract: Natural products such as certain chaetochromins are described. These compounds are useful in the inhibition of HIV integrase, the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.

Abstract: Natural products such as certain ermophilane sesquiterpenoids and derivatives thereof are described. These compounds are useful in the inhibition of HIV integrase, the prevention or treatment of infection by HIV and the treatment of AIDS, either as compounds, pharmaceutically acceptable salts, pharmaceutical composition ingredients, whether or not in combination with other antivirals, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described. The fungal culture MF6254, Xylaria sp. (ATCC 74397) is also described and disclosed.

Abstract: The present invention is directed to steroidal or terpenoidal compounds which inhibit farnesyl-protein transferase (FPTase). The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and treatment of cancer.

Abstract: The present invention is directed to steroidal or terpenoidal compounds which inhibit farnesyl-protein transferase (FPTase). The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and treatment of cancer.

Abstract: The present invention is directed to non-peptide compounds which inhibit farnesyl-protein transferase (FPTase) and the farnesylation of the oncogene protein Ras. The invention also relates to the process for the preparation of a compound of this invention by cultivating a culture of Phoma sp. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and the farnesylation of the oncogene protein Ras.

Abstract: The present invention is directed to compounds which inhibit farnesyl-protein transferase (FPTase) and the farnesylation of the oncogene protein Ras. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and the farnesylation of the oncogene protein Ras. Furthermore, Actinoplanes sp. ATCC 55532 and Streptomces sp. ATCC 55550 are microorganisms which are capable of producing the disclosed compounds which are classified as carboxylic acid esters. In addition a method for preparing the compounds is disclosed which includes cultivating strain ATCC 55532 or strain ATCC 55550. The strains are independently capable of producing the carboxylic acid ester compounds.

Abstract: The present invention is directed to compounds which inhibit farnesyl-protein transferase (FPTase) and the farnesylation of the oncogene protein Ras. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and the farnesylation of the oncogene protein Ras.

Abstract: The present invention is directed to compounds which inhibit farnesyl-protein transferase (FPTase) and the farnesylation of the oncogene protein Ras. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting farnesyl-protein transferase and the farnesylation of the oncogene protein Ras.

Abstract: This invention relates to pharmaceutical compounds of structural formulae (I) and (II): ##STR1## and compositions and methods of treatment utilizing these compounds to inhibit farnesyl protein transferase and farnesylation of the oncogene protein Ras.

Abstract: The present invention is directed to compounds which inhibit farnesyl-protein transferase (FPTase) and the farnesylation of the oncogene protein Ras. The invention is further directed to chemotherapeutic compositions containing the compounds of this invention and methods for inhibiting famesyl-protein transferase and the famesylation of the oncogene protein Ras.

Abstract: This invention relates to compounds of structural formula (I): ##STR1## which are squalene synthase inhibitors and thus useful as cholesterol lowering agents and antifungal agents. These compounds are also inhibitors of farnesyl protein transferase and farnesylation of the oncogene protein Ras and thus useful in treating cancer. This invention also relates to a process for obtaining compounds of structural formula (I).

Abstract: Novel cytochalasins are the biotransformed products after incubation with a substrate in a culture of the microorganism Kibdelosporangium sp. (Merck Culture Collection MA 6559), ATCC No. 53771. The compounds of the present invention inhibit HIV protease and are useful in the prevention or treatment of infection by HIV and the treatment of AIDS, either as a compound, pharmaceutically acceptable salt, pharmaceutical composition ingredient, whether or not as a prodrug or as a combination with other antivirals, anti-infectives, immunomodulators, antibiotics or vaccines.

Abstract: A dipeptide isostere is the biotransformed product after incubation with a culture of Streptomyces. It inhibits HIV protease, and is useful in the prevention or treatment of infection by HIV and the treatment of AIDS, either as a compound, pharmaceutically acceptable salt, pharmaceutical composition ingredient, whether or not as a prodrug or as a combination with other antivirals, anti-infectives, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.

Abstract: A novel dipeptide isostere is the biotransformed product after incubation with a culture of Streptomyces. It inhibits HIV protease, and is useful in the prevention or treatment of infection by HIV and the treatment of AIDS, either as a compound, pharmaceutically acceptable salt, pharmaceutical composition ingredient, whether or not as a prodrug or as a combination with other antivirals, anti-infectives, immunomodulators, antibiotics or vaccines. Methods of treating AIDS and methods of preventing or treating infection by HIV are also described.

Abstract: An antiviral agent produced by Hypoxylon fragiforme and having the structure: ##STR1## is described. The product has high activity as an HIV protease enzyme inhibitor and is useful in the treatment of diseases in which control of HIV protease activity is desirable.