N-[6-(2-methyl-2H-pyrazol-3-yl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-methanesulfonamide 、
氯甲酸异丁酯 以to yield methanesulfonyl-[6-(2-methyl-2H-pyrazol-3-yl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-carbamic acid isobutyl ester的产率得到methanesulfonyl-[6-(2-methyl-2H-pyrazol-3-yl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-carbamic acid isobutyl ester