You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2S)-1-[[(3R,5S,8S,16E)-8-butyl-7,10-dioxo-23-phenyl-2,11-dioxa-6,9,22-triazatetracyclo[16.6.2.13,6.021,25]heptacosa-1(24),16,18(26),19,21(25),22-hexaene-5-carbonyl]amino]-2-ethenylcyclopropane-1-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C39H44N4O7
assistant