You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[4-[[(4R,4aS,7aR,12bS)-4a,9-dihydroxy-3-methyl-1,2,4,5,7a,13-hexahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl]oxy]-2-hydroxy-4-oxobutanoyl]oxypropanoylamino]butanedioic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H32N2O13
assistant