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 (1R,2R,5S,8R,9R,10R,13R,14R,19R)-17-(4-ethoxycarbonylphenyl)-1,2,14,18,18-pentamethyl-16-oxo-8-prop-1-en-2-yl-17-azapentacyclo[11.8.0.02,10.05,9.014,19]henicosane-5-carboxylic acid .
user
C38H53NO5
assistant