A 甾体母核结构 B
C<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/18269499_0.gif">位常有羟基取代 C
C<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/18269499_0_1.gif">位常有硝基取代 D
C<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/18269499_0_2.gif">位常有苯基取代 E
C<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/18269499_0_3.gif">位常有环戊烷基取代