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 1-(dimethylamino)-3-[[3-[4-[3-[(dimethylaminocarbamoylamino)-methylamino]-2-hydroxypropoxy]butoxy]-2-hydroxypropyl]-methylamino]urea .
user
C18H42N8O6
assistant