The present invention relates to Compounds of formula (VI)
or of formula (V)
wherein
Y" is hydrogen, hydroxy or an OAc group, wherein Ac is an alkylcarbonyl group having from 1 to 4 carbon atoms in the alkyl moiety, and
X is a bromine atom or an OAc group.
本发明涉及式(VI)化合物
或式(V)
其中
Y" 是氢、羟基或 OAc 基团,其中 Ac 是烷基中含有 1 至 4 个碳原子的烷基羰基,以及
X 是
溴原子或 OAc 基团。