You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(17S)-17-[(1R)-1-hydroxyethyl]-23-methyl-12-(5-methyl-2-phenylfuran-3-carbonyl)-2-oxa-6,7,8,12,15,18-hexazatricyclo[18.3.1.16,9]pentacosa-1(23),7,9(25),20(24),21-pentaene-16,19-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H38N6O6
assistant