You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3-ethoxy-4-hydroxy-5-nitrobenzoyl)-dihydroxy-[(3S)-4-methoxy-4-oxo-3-(phenylmethoxycarbonylamino)butyl]phosphanium The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H26N2O11P+
assistant