abstract |
New pyridobenzoindole derivatives of general formula (I), in which R is H or alkyl (1 or 2 C), alk is alkylene (2 to 4 C) straight or branched, R₁ represents a hydrogen atom or an alkyl radical ( 1 or 2 C), R₂ represents a hydroxy or methoxy radical and R₃ is methyl or ethyl and their addition salts with acids, useful as anti-tumor agents. |