You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2R)-3-(1-hydroxy-1-methyl-3-phenylindolizin-4-ium-2-yl)selanyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid .
user
C23H27N2O5Se+
assistant