受保护群体;
EMAO contains six hydroxyl groups, in which the 9 'hydroxyl group has the highest activity, so the 9' hydroxyl group needs to be protected intently, whereas the rests are free of protection.
EMAO分子中含有6个羟基,其中9位肟的羟基活性最高,因而选择性地对9位肟羟基进行反应而不需要保护其余的羟基。
Meanwhile, we protected their as group of feebleness.
同时, 我们却把他们当作弱势群体来照顾.
Design and synthesis of tris ( 1-thiogalactopyranoside) having a methyl-protected carboxy group at the aglycon terminals
端基含甲基保护羧基的三半乳糖苷的设计和合成
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