pyrans

基本解釋

Pyran is not aromatic, but the phrylium ion is.
吡喃不是芳香的，但眬英嗡離子是。
Methods To establish the effect of Benzo pyran derivatives on rats by grouping randomly and giving medicine.
方法通過隨機(jī)分組,灌胃給藥、對比,確定苯并吡喃衍生物對小鼠血糖的影響。
Two new derivatives of 4 - dicyanomethylene - 2,6 - dimethyl - 4H - pyran and the corresponding poly (amic acid) were synthesized and characterized.
兩種新的4-二氰亞甲基-2;6-二甲基-4H-吡喃衍生物及對應(yīng)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.
在沒有酸催化的條件下,反應(yīng)生成3乙?；?羥基6甲基-吡喃4酮(8),并通過單晶X射線衍射分析確定了產(chǎn)物的結(jié)構(gòu);
Objective To observe the effect of Benzo pyran derivatives on normal rats and blood sugar of rats by Tetra oxygen pyrimidine.
目的觀察苯并吡喃衍生物對正常小鼠及四氧嘧啶所致糖尿病小鼠血糖的影響。