Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-methylpropenyl)-, (5-benzyl-3-furyl)methyl ester, cis- mixed with trans-2,2-dimethyl-3-(2-methylpropenyl) cyclopropanecarboxylic acid (5-benzyl-3-furyl)methyl ester (1:4) GZ1450000 Resmethrin racemic mixture