Tin steroids and their use as antineoplastic agents

A tin steroid compound,

• said tin steroid compound being the reaction product of a steroid compound and a tin compound, wherein said steroid compound is selected from the group consisting of cholic acid, testosterone, deoxycholic acid, cholesteryl chloride, cholesterol, and dehydroxycholesterol, and ##STR19## wherein R.sub.1, R.sub.2 and R.sub.3 can be the same or different, wherein said R.sub.1, R.sub.2 and R.sub.3 are selected from the group consisting of hydrogen, an alkyl having from 1 to 6 carbon atoms, a cycloalkyl having from 4 to 10 carbon atoms, an aromatic or an alkyl substituted aromatic having from 6 to 12 carbon atoms, and an aromatic substituted alkyl having from 7 to 12 carbon atoms, and wherein X is selected from the group consisting of hydroxyl, halide, hydroxide oxide wherein R.sub.2 and R.sub.3 do not exist, a dicarboxylic acid having from 2 to 10 carbon atoms, and a monocarboxylic acid having from 2 to 6 carbon atoms.