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-[4-[3-[5-ethyl-6-(methyliminomethyl)-4-oxo-7-propyl-3H-pyrrolo[3,2-d]pyrimidin-2-yl]-4-propoxyphenyl]sulfonylpiperazin-1-yl]ethyl nitrate .
user
C28H39N7O7S
assistant