You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(4S,11S,18S)-11-[(2S)-butan-2-yl]-4,7-dimethyl-2,9,16-trioxo-6-oxa-13,20-dithia-3,10,17,22,23,24-hexazatetracyclo[17.2.1.15,8.112,15]tetracosa-1(21),5(24),7,12(23),14,19(22)-hexaen-18-yl]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26N6O6S2
assistant