pyrans

基本解释

Pyran is not aromatic, but the phrylium ion is.
吡喃不是芳香的，但眬英嗡离子是。
Methods To establish the effect of Benzo pyran derivatives on rats by grouping randomly and giving medicine.
方法通过随机分组,灌胃给药、对比,确定苯并吡喃衍生物对小鼠血糖的影响。
Two new derivatives of 4 - dicyanomethylene - 2,6 - dimethyl - 4H - pyran and the corresponding poly (amic acid) were synthesized and characterized.
两种新的4-二氰亚甲基-2;6-二甲基-4H-吡喃衍生物及对应的聚酰胺酸被合成和表征.
Under the acid free condition, 3 acetyl 2 hydroxy 6 methyl pyran 4 one (8) was obtained and its structure was confirmed by X ray diffraction analysis.
在没有酸催化的条件下,反应生成3乙酰基2羟基6甲基-吡喃4酮(8),并通过单晶X射线衍射分析确定了产物的结构;
Objective To observe the effect of Benzo pyran derivatives on normal rats and blood sugar of rats by Tetra oxygen pyrimidine.
目的观察苯并吡喃衍生物对正常小鼠及四氧嘧啶所致糖尿病小鼠血糖的影响。