1'-acetyl-6-(diazoacetyl)spiro[cyclohex-3-ene-1,3'-indol]-2'(1'H)-one InChI=1/C17H15N3O3/c1-11(21)20-14-8-3-2-6-12(14)17(16(20)23)9-5-4-7-13(17)15(22)10-19-18/h2-6,8,10,13H,7,9H2,1H spiro[cyclohex-3-ene-1,3'-[3H]indol]-2'(1'H)-one, 1'-acetyl-6-(diazoacetyl)-