You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[[(2R,3R,4S,5S)-3-[2-(dimethylamino)ethyl-methylamino]-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]methyl]-3-[4-(trifluoromethoxy)phenyl]urea;dihydrochloride by IUPAC nomenclature, provide its molecular formula.
user
C19H31Cl2F3N4O5
assistant