申请人:Fukuda Hiroshi
公开号:US20090326225A1
公开(公告)日:2009-12-31
This invention relates to novel processes for the preparation of compounds of the formula [1],
wherein R
1
, R
2
, R
3
and R
4
are as defined in the claims and description as well as pharmaceutically acceptable salts thereof. The compounds of the formula [1] are hexacyclic compounds having potent anti-tumor activity.
本发明涉及一种新型制备式[1]化合物的方法,其中R1,R2,R3和R4如声明和描述中所定义,以及其药学上可接受的盐。该式[1]化合物是具有强效抗肿瘤活性的六环化合物。