3-(6-hydroxy-3-methyl-1,2-benzisoxazol-5-yl)-1-(4-methoxybenzyl)-1,3-dihydro-2H-indol-2-one 、
1-(diphenylmethyl)-3-(2-hydroxy-4-methoxy-5-methylphenyl)-1,3-dihydro-2H-indol-2-one 以1′-(4-methoxybenzyl)-3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3′-indol]-2′(1′H)-one was obtained (95%) as a colorless solid的产率得到1'-(4-methoxybenzyl)-3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3'-indol]-2'(1'H)-one