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 2-[5-[18-(12-acetamidododecylamino)-7-hydroxy-18-oxooctadec-9-en-6-yl]oxy-5-oxopentanoyl]oxyethyl-trimethylazanium .
user
C42H80N3O7+
assistant