这些峰分别相当于乙基和丙基的侧链开裂。
These peaks correspond to side-chain cleavage of the ethyl and propyl groups respectively.
对产物组成进行了鉴定，并用红外光谱讨论了烯丙基的结构。
The product was identified and its infrared absorption related to the structure of allyl group was discussed.
本合成工作的关键为9,15环丙基的形成及在重建GA骨架时a环中双键的重排反应。
The key reactions included the formation of 9, 15-cyclopropyl function and double bond migration in the a ring to reestablish the GA skeleton.
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