You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4R,10S,16S,22S)-16-(4-aminobutyl)-10,22-dibenzyl-6,12-bis(2-cyclopropylacetyl)-2,8,14,20,25-pentaoxo-2'-phenyl-18-(3-phenylpropanoyl)spiro[28-thia-3,6,9,12,15,18,21,24-octazabicyclo[28.2.2]tetratriaconta-1(32),30,33-triene-4,1'-cyclopropane]-24-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C72H90N10O9S
assistant