You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N'-[[5-cyclopropyl-3-(2,6-dichlorophenyl)-1,2-oxazol-4-yl]methyl]-N'-propylethane-1,2-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H23Cl2N3O
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