... Three steroids were isolated from M. mutics and identified as cholesterol,elcosenoic acid cholesterol ester,cholester 4 ene 3 one. 分得 3个甾体化合物 ,分别为胆甾醇、十二烯酸胆甾醇酯、甾醇 4 烯 3 酮。 In this paper,the polyimides with ester group side chain and ether group side chain were synthesized from 4CAB/MDA/PMDA and 4AB/MDA/PMDA. 通过实验室自行合成的两种不同侧链的二胺单体,与4,4'-二胺基二苯甲烷和均苯四羧酸二酐聚合得到含有酯键型侧链和含有醚键型侧链结构的两种聚酰亚胺。 Results:Three steroids were isolated from M. mutics and identified as cholesterol,elcosenoic acid cholesterol ester,cholester 4 ene 3 one. 结果:分得3个甾体化合物,分别为胆甾醇、十二烯酸胆甾醇酯、甾醇4烯3酮。 ...

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