You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[[(3,4-dihydro-2H-chromen-4-ylamino)-(4-propan-2-yloxybutylamino)methylidene]amino]-N,N-dimethylacetamide .
user
C21H34N4O3
assistant