| 分类号 |
G01N31/22;C07C67/00;C07C253/00;C07C255/32;C07C255/37;C07C255/41;C07C255/42;C07C255/44;C07C255/53;C07C255/58;C07C301/00;C07C309/29;C07C309/42;C07C309/46;C07C311/00;C07C311/02;C07C311/15;C07D295/14;C07D317/60;C07D319/18;C12Q1/28;G01N33/50;G01N33/52;G01N33/72;(IPC1-7):C07C255/37;C07C311/21 |
主分类号 |
G01N31/22 |
