Antiproliferative compounds having a structure represented by formula (II), where n, R
1
, R
2
, R
3
, R
4
, and R
5
are as defined herein, can be used to treat tumors, optionally when conjugated to a ligand such as an antibody:
具有公式(II)所表示结构的抗增殖化合物,其中n,R1,R2,R3,R4和R5的定义如本文所述,可用于治疗肿瘤,可选择与
配体(如
抗体)结合使用: