| 摘要 |
New tetracyclic derivatives (I) and their stereoisomers and/or salts. New tetracyclic compounds of formula (I) and their stereoisomers and/or salts. R1, R2 = H; or 5-10C aryloxy, 1-6C alkoxy, 2-6C alkenyloxy or 2-6C alkynyloxy (all optionally substituted by 1 or 2 groups Q); or R1 + R2 = 1-6C alkylenedioxy; Q = OH, NH2 or halo; or 1-6C alkoxy, 2-6C alkenyloxy, aryl, 1-6C alkylamino or 2-6C alkenylamino (all optionally substituted by CN or amide); R3 = H; or 5-10C aryl, 1-6C alkyl, 2-6C alkenyl or 2-6C alkynyl (all optionally substituted by 1 or 2 groups Q); R4 = COOR3, CONHR3, CHO, CH2OR3, CH2OSi(R3)3, CH2Br or CH2CN; dotted lines = single or double bonds; An Independent claim is included for the preparation of (I). |
