CLARKE, WILLIAM,CROCKER, LOUIS S.,KUKURA, JOSEPH L.
申请号：
HU0001313
公开号：
HU229087B1
申请日:
1998.02.02
申请国别(地区):
HU
年份:
2013
代理人:
摘要：
A method for crystallising (-)-6-chloro-4-cyclopropyl ethynyl 4-trifluoromethyl- 1,4-dihydro-2H- 3,1-benzoxazin-2-one of formula (I) comprises dissolving (I) in a solvent, then adding an antisolvent to initiate crystallisation. Also claimed are Forms I, II and III of (I).
