单词	epimer
释义	epimer noun epi·​mer ˈe-pi-mər  : either of two stereoisomers that differ in the arrangement of groups on a single asymmetric carbon atom (such as the first chiral center of a sugar's carbon chain) epimeric ˌe-pi-ˈmer-ik  adjective Word History Etymology epi- + isomer First Known Use circa 1911, in the meaning defined above Medical Definition epimer noun epi·​mer ˈep-i-mər  : either of the stereoisomers of a sugar or sugar derivative that differ in the arrangement of the hydrogen atom and the hydroxyl group on the first asymmetric carbon atom of a chain
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