You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (4aS,7R,8aR)-3-[(1S)-1,2-diphenylethyl]-2-ethyl-4,4,7-trimethyl-2-oxido-4a,5,6,7,8,8a-hexahydrobenzo[e][1,3,2]oxazaphosphinin-2-ium ?
user
C26H36NO2P
assistant