You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(1S)-1-methyl-5,8,12-trioxo-14-oxapentacyclo[11.6.1.02,11.04,9.016,20]icosa-2(11),3,6,9,13(20),15-hexaen-17-yl] 3-[2,4-dioxo-3-[2-[4-[6-[5-(2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,4-d]imidazol-4-yl)pentanoylamino]hexanoyl]piperazin-1-yl]ethyl]imidazolidin-1-yl]sulfanylpropanoate .
user
C48H57N7O11S2
assistant