The active ingredient of α - pyrone 0.2 % wettable powder is 5,6 - dihydro - 6 - pentyl - 2 H - pyran - 2 - one.

0.2%α - 吡喃酮WP的 有效成分为5, 6- 二氢-6-戊基-2H-吡喃 -2- 酮(5, 6-dihydro-6-pentyl-2H-pyran-2-one ).

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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.

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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.

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