It'shows that the key step is the synthesis of 4-methyl-dihydro-furan-2, 3-dione.

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。

youdao

It'shows that the key step is the synthesis of 4-methyl-dihydro-furan-2, 3-dione.

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。

youdao