3-(4-methoxyphenyl)-6-dimethylaminophthalide 、
2-苯基吲哚 以respectively, instead of 33 g of 3-(m-diethylaminophenyl)-6-dimethylaminophthalide and 13 g of dimethylaniline to obtain 24 g of 3-(p-methoxyphenyl)-3-(2-phenylindole-3-yl)-6-dimethylaminophthalide having the following structure whose m.p. was 224°-225° C.的产率得到3-[3-(Diethylamino)phenyl]-6-(dimethylamino)-2-benzofuran-1(3H)-one