abstract |
The invention provides an alkylator that is an analog of a compound based on 5-oxo-1a,2,3,5-tetrahydro-1H-3-aza-cyclopropa[c]indene-7-carboxylic acid, 9a-chloromethyl-4-oxo-2,4,9,9a-tetrahydro-1H-2-aza-cyclopropa[1,5]cyclopenta[1,2-a]naphthalene-7-carboxylic acid, or 4-oxo-1,2,4,5,8,8a-hexahydrocyclopropa[c]pyrrolo[3,2-e]indole-6-carboxylic acid and conjugates thereof. |