(3aR,3bS,6aS,6bR)-2,5-Dimethyl-6a,6b-bis-trifluoromethyl-6a,6b-dihydro-1,6-dioxa-3,4-diaza-cyclobutadicyclopentene-3a,3b-dicarboxylic acid diethyl ester 在
氢溴酸 作用下,
生成
1trans.2trans-Bis-acetamino-3trans.4trans-dihydroxy-3cis.4cis-bis-trifluormethyl-cyclobutan-dicarbonsaeure-(ref.2cis)-diethylester