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system
Provide the molecular formula for the IUPAC named substance 11'-bromo-13,13-dimethylspiro[indeno[1,2-c]xanthene-7,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8(13),9,11,15,17-nonaene];10'-bromospiro[21-oxa-10-thiapentacyclo[11.8.0.03,11.04,9.015,20]henicosa-1(13),2,4,6,8,11,15,17,19-nonaene-14,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8(13),9,11,15,17-nonaene];11'-bromospiro[21-oxa-10-thiapentacyclo[11.8.0.03,11.04,9.015,20]henicosa-1(13),2,4,6,8,11,15,17,19-nonaene-14,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8(13),9,11,15,17-nonaene];11',17'-dibromospiro[21-oxa-10-thiapentacyclo[11.8.0.03,11.04,9.015,20]henicosa-1(13),2,4,6,8,11,15,17,19-nonaene-14,14'-tetracyclo[13.4.0.02,7.08,13]nonadeca-1(15),2,4,6,8(13),9,11,16,18-nonaene] .
user
C151H89Br5O4S3
assistant