The drug component of an antibody-drug conjugate having a structure according to formula (II), where Ab, m, n, R1, R2, R3, R4, and R5 are as defined in the application, exhibits unexpectedly improved stability.
抗体药物复合物的药物组分具有按照公式(II)定义的结构,其中Ab、m、n、R1、R2、R3、R4和R5如申请中所定义,表现出意外地提高了稳定性。