You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-[(2S)-1-[[(4R,4aS,7aR,12bS)-4a-hydroxy-9-(hydroxymethyl)-3-methyl-1,2,4,5,7a,13-hexahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl]oxy]-1-oxopropan-2-yl]oxy-2-amino-5-oxopentanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C26H32N2O9
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