、
6-羟基-1,4-苯并二噁烷 、
3,4-二甲基苯酚 、 6-{[5-(trifluoromethyl)furan-2-yl]methyl}-2,3-dihydro-6H-[1,4]dioxino[2,3-f]indole-7,8-dione 、
N-二苯甲基靛红 以8-hydroxy-8-(7-hydroxy-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-6-((5-(trifluoromethyl)furan-2-yl)methyl)-6,8-dihydro-2H-[1,4]dioxino[2,3-f]indol-7(3H)-one was obtained (80%)的产率得到8-hydroxy-8-(7-hydroxy-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-6-((5-(trifluoromethyl)furan-2-yl)methyl)-6,8-dihydro-2H-[1,4]dioxino[2,3-f]indol-7(3H)-one