英语语法分析

Friedelin and Simiarenol were isolated from oil for the first time.

其中木栓酮、西米杜鹃醇为首次从油中分离报道。

The structures of these compounds were determined as friedelin(1), 5 hydroxymethyl furaldehyde(2), limonin(3), nomilin(4), daucosterol(5)by spectral methods.

经光谱数据的分析，分别鉴定为木栓酮（1）、5 羟甲基糠醛（2 ）、柠檬苦素（3）、闹米林（4 ）及胡萝卜苷（5 ） 。