You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2S,3R)-2-[(S)-[(2R,3R,4R,5S,6R)-3,4-dihydroxy-5-[[6-[3-(4-hydroxybutyl)-5-methylphenyl]-1H-pyrrolo[3,4-b]pyrrol-5-yl]oxy]-6-[3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxyoxan-2-yl]-hydroxymethoxy]carbonyl-5-hydroxy-3-(methylamino)pentanoic acid by IUPAC nomenclature, provide its molecular formula.
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C45H49N3O15
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