1. Conjugate binding compound-an active compound of the general formula (Ia) wherein n is a number from 1 to 50, AK is a linking compound, preferably a chimeric humanized or human antibody, particularly preferably an EGFR antibody, a group of g-L1-B-L2 -g represents a linker, where g denotes a point of attachment to the group AK, and ߧ denotes a point of attachment to the nitrogen atom, D represents a group of formula # b Teal, tert-butyl, phenyl, benzyl, 1-hydroxyethyl, 4-hydroxybenzyl, 4-hydroxy-3-nitrobenzyl, 4-hydroxy-3-aminobenzyl, 1-phenylethyl, diphenylmethyl, 1H-imidazol-4-ylmethyl or 1H- indol-3-ylmethyl, or R and R together with the carbon atom to which they are attached form (1S, 2R) -2-phenylcyclopropane-1, 1-diyl of formula #################################################################################################################################### & lt hydrogen, hydroxy or benzyloxy, R3 is hydrogen or methyl, R3 is isobutyl, sec-butyl, t-butyl, phenyl, benzyl, 1-hydroxyethyl, 4-hydroxybenzyl, 4-hydroxyl-3-nitrobenzyl, 4-hydroxyl -3-aminobenzyl, 1-phenylethyl, diphenylmethyl, 1H-imidazol-4-ylmethyl or 1H-indole-3-ylmethyl, or R and R together with the carbon atom to which they are attached form (1S, 2R) -2-phenylcyclopropane -1,1-diyl of formula ################################################################################################################# ring A present thereon with NO group is a mono- or bicyclic heterocycle optionally containing substituents of formula wherein # denotes the point of binding to the carbonyl group, R is hydrogen, hydroxy or benzyloxy, R is hydrogen or methyl, R is isobutyl, sec-butyl, tert-butyl, phenyl, benzyl, 1-hydroxyethyl, 4-hydroxybenzyl, 4-hydroxy-3-nitrobenzyl, 4-hydroxy-3-aminobenzyl, 1-phenylethyl, diphenylmethyl, 1H-imidazol-4-ylmethyl or 1H-indole 3-ylmethyl, or R and R together with the carbon atom to which they are attached form a (1S, 2R) -2-phenyl-cyclopropane-1,1-diyl formula wherein # denotes
