19 Norandrostenes

《英文msh詞典》19 Norandrostenes
[入口詞] 19 Norandrostenes
[主題詞] Estrenes
[英文釋義] Unsaturated derivatives of the ESTRANES with methyl groups at carbon-13,with no carbon at carbon-10,and with no more than one carbon at carbon-17. They must contain one or more double bonds.

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