You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 1-(3,5-dimethoxyphenyl)-3-[N-(4,6-dimethylpyrimidin-2-yl)-N'-(oxolan-2-ylmethyl)carbamimidoyl]thiourea ?
user
C21H28N6O3S
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