1,3-Benzodioxan-2-carboxylic acid, 6-chloro-2,4-dimethyl-4-phenyl-, (E)- 4H-1,3-Benzodioxin-2-carboxylic acid, 6-chloro-2,4-dimethyl-4-phenyl-, trans- 86616-89-9 trans-6-Chloro-2,4-dimethyl-4-phenyl-1,3-benzodioxan-2-carboxylic acid