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system
For the molecule named (1R,2R,7S,9S)-8-[[2-[[2-[[(1R,2R,7S,9S)-4,12-diphenyl-3,5,11,13-tetraoxa-8-azatricyclo[7.4.0.02,7]tridecan-8-yl]methyl]phenyl]diselanyl]phenyl]methyl]-4,12-diphenyl-3,5,11,13-tetraoxa-8-azatricyclo[7.4.0.02,7]tridecane by IUPAC nomenclature, provide its molecular formula.
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C54H52N2O8Se2
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