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This drug is salt (methyl phenyl(piperidin-2-yl)acetate) but doesn't contain sodium chloride in the molecule.
Methyl acetate is occasionally used as a solvent
Yes
The chemical name of ritalin is methyl phenyl(piperidin-2-yl) acetate (in English language) and the chemical formula is C14H19O2N.
Carbon, hydrogen, and oxygen atoms; the molecular formula of methyl acetate is C3H6O2.