分类号 |
C07D251/14;C07D213/74;C07D213/75;C07D239/42;C07D239/47;C07D239/48;C07D239/52;C07D251/16;C07D251/18;C07D251/22;C07D251/40;C07D251/44;C07D251/46;C07D251/50;C07D251/52;C07D251/70;C07D253/06;C07D257/08;C07D403/12;C07D405/12;C07D409/12;C07D417/12;C07D521/00 |
主分类号 |
C07D251/14 |