The invention describes a process for epimer enrichment of compounds of formula (I) where R<1>1 and R<2> are as defined in the description, by fractional crystallization.
申请公布号
DE19635498(A1)
申请公布日期
1998.03.26
申请号
DE19961035498
申请日期
1996.09.03
申请人
BYK GULDEN LOMBERG CHEMISCHE FABRIK GMBH, 78467 KONSTANZ, DE
