You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[3-(3,4-dihydro-1H-isoquinolin-2-yl)-2-hydroxypropyl]-3-ethyl-1-methyl-1-(oxolan-3-ylmethyl)guanidine;hydroiodide into molecular formula.
user
C21H35IN4O2
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