You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(5S,5aS,8aR,9R)-8-hydroxy-9-(4-hydroxy-3,5-dimethoxyphenyl)-5,5a,6,8,8a,9-hexahydro-[2]benzofuro[5,6-f][1,3]benzodioxol-5-yl]-3-(4-aminobutyl)urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H33N3O8
assistant