You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-N,1-N,1-N-tris[1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl]-1-[4-(10,15,20-triphenyl-21,23-dihydroporphyrin-5-yl)phenyl]methanetricarboximidic acid by IUPAC nomenclature, provide its molecular formula.
user
C60H59N7O12
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