You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (1S,2R,3R,6S,8S,9R,10S)-5-cyclohexyl-9-hydroxy-6-propan-2-yl-7-oxa-5-azatetracyclo[6.3.0.02,6.03,10]undecan-4-one ?
user
C18H27NO3
assistant