You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[bis(phenylmethoxy)phosphorylmethyl]-5-oxo-5-[4-[(3R,7R,10S,12S,13R)-3,7,12-trihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoyloxymethoxy]pentanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C45H63O12P
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