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 (3S)-1-butyl-3-(2-methylpropyl)-9-[(4-phenylthiophen-2-yl)methyl]-1,4,9-triazaspiro[5.5]undecane-2,5-dione;hydrochloride .
user
C27H38ClN3O2S
assistant