the other two , 9-deoxydoxorubicin ( 3 ) and 3'-deamino-3'-hydroxy-4'-epidoxorubicin ( 4 ) , are doxorubicin analogues with modifications of the chemical groups that have been proposed as responsible for sequence specificity ( chen , k.-x. , gresh , n. and pullman , b . ( 1985 ) . j. biomol . struct . dyn . 3 , 445-466 ) .
C0014582
epidoxorubicin
C0013089
doxorubicin