The purified compound showed a molecular formula of C28H44O3, displaying characteristic features of epidioxy sterols and was reverted to ergosterol when submitted to S. schenckii enzymatic extract.
纯化化合物展示了分子式C28H44O3，显示过氧甾醇的特征和复归麦角提交给美国时，申克酶提取。
Before we can assign a structural formula to a compound, we must first know its molecular formula.
在确定一个化合物的结构式之前，首先应知道它的分子式。
The calculation of molecular formula of compounds was described by13C NMR (com, DEPT) data in this paper. It is a useful method for unknown compounds.
介绍了用13cNMR (COM,DEPT)数据计算化合物的分子式，该方法有利于未知化合物的分子式计算。
Based on the valence bond theory, a general molecular formula for organic com - pounds is derived.
本文根据价键理论导出了一个有机化合物的分子总通式。
Through molecular structure design and material selection formula and the development process of orthogonal test of a new generation of KH high efficiency foaming agent.
通过分子结构设计和材料优选配方与工艺正交试验研制的新一代KH高效发泡剂。
Gives a formula for calculation of crude oil molecular weight and compares the results calculated from crude oil samples.
给出了一个原油分子量计算公式，并对原油样品的计算结果进行了比较。
Facing thees numerous and complicated molecular formula, he doesn't know what to do, because he is a layman to them. His major is art.
面对着这些纷繁的分子式，他不知如何是好，因为他对它们一窍不通，他是学艺术的。
To provide the molecular formula and molecular weight, as the substance has a unique and defined molecular structure according to item III of your notification form.
根据申报表项填写情况，申报物质有唯一确定的分子结构，所以应准确填写申报物质的分子式和分子量。
The invention provides a perfluorinated ion exchange resin and a preparation method and application thereof. The molecular formula of the perfluorinated ion exchange resin is shown as the formula m.
本发明提供了一种全氟离子交换树脂，该全氟离子交换树脂的分子式如式m所示。
Menthol is a chemical agent, menthol by the mint leaves and stems in the extract, white crystals, molecular formula C10H20O, mint, and peppermint oil to the main ingredient.
薄荷脑是一种化学药剂，薄荷脑系由薄荷的叶和茎中所提取，白色晶体，分子式c 10h20o，为薄荷和欧薄荷精油中的主要成分。
Menthol is a chemical agent, menthol by the mint leaves and stems in the extract, white crystals, molecular formula C10H20O, mint, and peppermint oil to the main ingredient.
薄荷脑是一种化学药剂，薄荷脑系由薄荷的叶和茎中所提取，白色晶体，分子式c 10h20o，为薄荷和欧薄荷精油中的主要成分。
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