2-氯-4-三氟甲基吡啶 、
6-甲基-1,3-苯并二氧-5-甲醛 以2.1 g (yield 73%) of (2-methyl-4,5-(methylenedioxy)phenyl)(2-chloro-4-trifluoromethyl-3-pyridyl)methanol (m.p. 127-130° C.) was obtained by a process in accordance with step (a) of Synthesis Example 1的产率得到(2-methyl-4,5-(methylenedioxy)phenyl)(2-chloro-4-trifluoromethyl-pyridin-3-yl)methanol