2′,4-Dioxo-2,3-diphenyl-1′,2′-dihydrospiro[cyclopent-4-ylium-1,3′-indole]

2′,4-Dioxo-2,3-diphenyl-1′,2′-dihydrospiro[cyclopent-4-ylium-1,3′-indole]

2′,4-Dioxo-2,3-diphenyl-1′,2′-dihydrospiro[cyclopent-4-ylium-1,3′-indole]

2′,4-Dioxo-2,3-diphényl-1′,2′-dihydrospiro[cyclopent-4-ylium-1,3′-indole]

Spiro[cyclopent-4-ylium-1,3′-[3H]indole], 1′,2′-dihydro-2′,4-dioxo-2,3-diphenyl-