You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (1R,3S,4S,5R,7S,8S,13R,27S,28R)-28-[(3S,4S)-6-cyclopentyloxy-4-hydroxy-8-[[5-hydroxy-2-(3-hydroxyphenyl)phenyl]methyl]-3,4-dihydro-2H-chromen-3-yl]-27-(3-methoxypropyl)spiro[2,17,26-trioxa-9,11-diazaheptacyclo[16.10.2.24,7.03,8.08,13.019,24.025,29]dotriaconta-18,20,22,24,29,31-hexaen-14-yne-10,1'-cyclopentane]-5,21-diol by IUPAC nomenclature, provide its molecular formula.
user
C62H68N2O11
assistant