Abstract: 4-O esters of podophyllotoxin and 4?-demethylepipodophyllotoxin are provided. The compounds are 4-O esters of an alkanoic acid or substituted alkanoic acid and podophyllotoxin and 4?-demethylepipodophyllotoxin. The compounds are useful for treating cancer.

Abstract: 4-O esters of podophyllotoxin and 4?-demethylepipodophyllotoxin are provided. The compounds are 4-O esters of an alkanoic acid or substituted alkanoic acid and podophyllotoxin and 4?-demethylepipodophyllotoxin. The compounds are useful for treating cancer.

Abstract: Camptothecin-based compounds are useful for treating a neoplasm in mammalian subjects by administering such compound to the subjects in combination with radiotherapy, i.e., the treatment of tumors with radioactive substances or radiation from a source external to the subject. Camptothecin-based compounds are modified by positioning at least one electron-affinic group around the camptothecin structure to enhance their value in combination with radiotherapy. New Camptothecin-based compounds are disclosed that are useful for treating cancer by administering the novel compounds alone or in combination with radiotherapy.

Abstract: Taxanes containing electron-affinic radiosensitizing functional groups, their pharmaceutical preparations, and methods of making and using this new class of highly potent radiosensitizers of tumor cells.

Abstract: (20) esters of camptothecin analogs are provided. The compounds are (20) esters of an aminoalkanoic acid or an imidoalkanoic acid and homocamptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the homocamptothecin ring. The compounds are useful for treating cancer.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an aminoalkanoic acid or an imidoalkanoic acid and camptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.

Abstract: 4-O esters of podophyllotoxin and 4?-demethylepipodophyllotoxin are provided. The compounds are 4-O esters of an alkanoic acid or substituted alkanoic acid and podophyllotoxin and 4?-demethylepipodophyllotoxin. The compounds are useful for treating cancer.

Abstract: Certain N-deacetylcolchicine and N-deacetylthiocolchine derivatives are described wherein the 7-N position on the B ring is substituted with the group —C(O)—(CHR4)m—AR, wherein m is an integer of 0-10, A is S, O, N or a covalent bond; R1 is substituted phenyl or substituted benzoyl; optionally substituted cycloalkyl of 3-7 carbons; optionally substituted naphtyl; an optionally substituted imide ring; an optionally substituted 5 or 6 member heterocycle with at least one N, S, or O in the ring; or an optionally substituted fused heterocyclic or fused carboxyclic ring system; R2 (at the 2-position of the A ring) is methoxy, hydroxy, or methylenedioxy when taken together with R3; R3 (at the 3-position of the A ring) is methoxy, hydroxy, a monosaccharide radical, or is methylenedioxy when taken together with R2; and R4 is H or is H or methyl when m is 1. Also dimers of such compounds are disclosed.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an aminoalkanoic acid or an imidoalkanoic acid and camptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.

Abstract: Certain N-deacetylcolchicine and N-deacetylthiocolchine derivatives are described wherein the 7-N position on the B ring is substituted with the group —C(O)—(CHR4)m-AR, wherein m is an integer of 0-10, A is S, O, N or a covalent bond; R1 is substituted phenyl or substituted benzoyl; optionally substituted cycloalkyl of 3-7 carbons; optionally substituted naphtyl; an optionally substituted imide ring; an optionally substituted 5 or 6 member heterocycle with at least one N, S, or O in the ring; or an optionally substituted fused heterocyclic or fused carboxyclic ring system; R2 (at the 2-position of the A ring) is methoxy, hydroxy, or methylenedioxy when taken together with R3; R3 (at the 3-position of the A ring) is methoxy, hydroxy, a monosaccharide radical, or is methylenedioxy when taken together with R2; and R4 is H or is H or methyl when m is 1. Also dimers of such compounds are disclosed.

Abstract: (20) esters of camptothecin analogs are provided. The compounds are (20) esters of an aminoalkanoic acid or an imidoalkanoic acid and homocamptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the homocamptothecin ring. The compounds are useful for treating cancer.

Abstract: C-20 esters of homo-camptothecin analogues are provided. The compounds are C-20 esters of an oxyalkanoic acid and homo-camptothecin, which are optionally substituted at the 7, 9, 10, 11, and 12 positions of the homo-camptothecin ring. The compounds are useful for treating cancer.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an aminoalkanoic acid or an imidoalkanoic acid and camptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an aminoalkanoic acid or an imidoalkanoic acid and camptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.

Abstract: Novel nitroimidazole compounds are provided that have a substituent linked via an ester linkage. The ester linkage may be obtained by derivation of the hydroxyl group of metronidazole. These nitroimidazole ester analogs have anti-microbial activity, with a number of novel compounds having an anti-microbial activity that is significantly improved with respect to metronidazole.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an aminoalkanoic acid or an imidoalkanoic acid and camptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.

Abstract: Taxanes containing electron-affinic radiosensitizing functional groups, their pharmaceutical preparations, and methods of making and using this new class of highly potent radiosensitizers of tumor cells.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an oxyalkanoic acid and camptothecin, which is optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.

Abstract: A compound comprising and diamine containing from 2-4 electron-affinic radiosensitizing functional groups or a salt thereof is provided. In a preferred embodiment the compound has the formula wherein A comprises a carbon carbon having from about 2-10 carbon in the chain, R1, R2, R3, and R4 are H, or T, T is wherein A′ comprises a carbon chain having from about 1-8 carbon in the chain, is R5 is H, lower alkyl, and halo, and R6 is H, lower alkyl, halo or nitro, provided that at least one of R1 and R2, and at least one of R3 and R4 is T. Intermediates for, pharmaceutical compositions containing, methods for making and methods for using such compounds to radiosensitize and kill hypoxic tumor cells are also provided.

Abstract: (20S) esters of camptothecin analogs are provided. The compounds are (20S) esters of an oxyalkanoic acid and camptothecin, which is are optionally substituted at the 7, 9, 10, 11, and 12 positions of the camptothecin ring. The compounds are useful for treating cancer.