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 4-[4-[(3R,8aR)-1,2,3,5,6,7,8,8a-octahydroindolizin-3-yl]phenyl]sulfanyl-N'-hydroxybenzenecarboximidamide .
user
C21H25N3OS
assistant