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 1-[(1S,2S,4S)-2-bicyclo[2.2.1]heptanyl]-3-[(1R)-1,2,3,4-tetrahydronaphthalen-1-yl]thiourea .
user
C18H24N2S
assistant