You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-[3-(3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl)propyl]-3-ethyl-2-[(2-methyl-1,3-thiazol-5-yl)methyl]guanidine .
user
C20H27N5O2S
assistant