Semi-synthetic ecteinascidins

The compound Boc-Et 729, which has the following structure:

The compound Iso-Et 743, which has the following structure:

The compound Et 875, which has the following structure:

The compound Et 1560, which has the following structure:

A pharmaceutical composition comprising the compound Et 757 and a pharmaceutically acceptable diluent, carrier, or excipient.

A pharmaceutical composition comprising the compound Boc-Et 729 and a pharmaceutically acceptable diluent, carrier, or excipient.

A pharmaceutical composition comprising the compound Iso-Et 743 and a pharmaceutically acceptable diluent, carrier, or excipient.

A pharmaceutical composition comprising the compound Et 875 and a pharmaceutically acceptable diluent, carrier, or excipient.

A pharmaceutical composition comprising the compound Et 1560 and a pharmaceutically acceptable diluent, carrier, or excipient.

A method of treating a patient suffering from a mammalian tumor selected from the group consisting of mammalian leukemia, mammalian melanoma and mammalian lung carcinoma, comprising administering to said patient, an effective antitumor amount of carcinoma, comprising administering to said patient, an effective antitumor amount of the substantially pure compound designated herein as Et 757 and a pharmaceutically acceptable carrier, diluent or excipient.

A method of treating a patient suffering from a mammalian tumor selected from the group consisting of mammalian leukemia, mammalian melanoma and mammalian lung carcinoma, comprising administering to said patient, an effective antitumor amount of the substantially pure compound designated herein as Boc-Et 729 and a pharmaceutically acceptable carrier, diluent or excipient.

A method of treating a patient suffering from a mammalian tumor selected from the group consisting of mammalian leukemia, mammalian melanoma and mammalian lung carcinoma, comprising administering to said patient, an effective antitumor amount of the substantially pure compound designated herein as Iso-Et 743 and a pharmaceutically acceptable carrier, diluent or excipient.

A method of treating a patient suffering from a mammalian tumor selected from the group consisting of mammalian leukemia, mammalian melanoma and mammalian lung carcinoma, comprising administering to said patient, an effective antitumor amount of the substantially pure compound designated herein as Et 875 and a pharmaceutically acceptable carrier, diluent or excipient.

A method of treating a patient suffering from a mammalian tumor selected from the group consisting of mammalian leukemia, mammalian melanoma and mammalian lung carcinoma, comprising administering to said patient, an effective antitumor amount of the substantially pure compound designated herein as Et 1560 and a pharmaceutically acceptable carrier, diluent or excipient.