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 octadecyl 3-[3,5-ditert-butyl-4-[3,5,5-tris[2,6-ditert-butyl-4-(3-octadecoxy-3-oxopropyl)phenyl]-3,9-bis(1-hydroxy-2-methylpropan-2-yl)-2,4,8,10-tetraoxaspiro[5.5]undecan-1-yl]phenyl]propanoate;phosphorous acid .
user
C155H274O20P2
assistant