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 2-[2-(9H-fluoren-9-ylmethoxycarbonylamino)ethyl-[2-[6-[[(4-methoxyphenyl)-diphenylmethyl]amino]-2-oxo-1,4-dihydropyrimidin-3-yl]acetyl]amino]acetic acid .
user
C45H43N5O7
assistant