“二酮”造句
研究结果表明关键步骤为原料 4- 甲基 -2, 3- 呋喃
二酮的合成.
It'shows that the key step is the synthesis of 4 - methyl - dihydro - furan - 2 , 3 - dione.
氢化可的松 ( hydrocortisone,HC ), 化学名称为11β,17α, 21-三羟基孕甾 -4- 烯 -3,20-
二酮, 属肾上腺皮质激素类药.
Hydrocortisone ( HC ), 11� � , 17α, 21 - trihydroxypregn - 4 - ene - 3,20 - dione, is an important grucocorticoid.
因此,含有β-
二酮基和乙基的有机铟配合物的热稳定性大小为:EtIn ( β-diket ) 2>Et2In ( β-diket ).
The complex of the EtIn ( diket ) 2 has higher thermal stability than th at of the Et 2 In ( diket ).