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 4-N,8-N-dimethyl-2-N,6-N-bis(2-methylpropyl)pyrimido[5,4-d]pyrimidine-2,4,6,8-tetramine;hydrochloride .
user
C16H29ClN8
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