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-[(2S,3R)-1-(3,5-difluorophenyl)-4-[[4-(3-ethylphenyl)oxan-4-yl]amino]-3-hydroxybutan-2-yl]-3-phenylurea .
user
C30H35F2N3O3
assistant