A conjugate of formula (A):
where Y is selected from a single bond, and a group of formulae A1 or A2:
where N shows where the group binds to the N10 of the PBD moiety;
R
L1
and R
L2
are independently selected from H and methyl, or together with the carbon atom to which they are bound form a cyclopropylene group;
CBA represents a cell binding agent;
Q is independently selected from O, S and NH;
R
11
is either H, or R or, where Q is O, SO
3
M, where M is a metal cation.
一种公式(A)的共轭物,其中Y从单键和公式A1或A2的一组中选择:其中N显示该基团与
PBD部分的N10结合的位置;RL1和R
L2独立地选择自H和甲基,或者与它们结合的碳原子一起形成
环丙烷基团;CBA代表细胞结合剂;Q独立地从O、S和NH中选择;R11是H,或者R,其中Q是O时,为SO3M,其中M是
金属阳离子。