Ritalin is the brand name for methylphenidate, a synthetic central nervous system stimulant.
- Chemical name (IUPAC):
Methyl 2-phenyl-2-(piperidin-2-yl)acetate - Molecular formula:
C₁₄H₁₉NO₂ - Molar mass:
233.31 g/mol
Chemical class
- Piperidine derivative
- Phenylacetate ester
- Synthetic stimulant
Key structural features
- A piperidine ring (six-membered nitrogen-containing heterocycle)
- A phenyl (benzene) ring
- A methyl ester group
- A chiral carbon linking the phenyl and piperidine portions of the molecule
Functional groups
- Ester (–COOCH₃)
- Secondary amine (within the piperidine ring)
- Aromatic phenyl ring
Stereochemistry
- Contains two chiral centers
- Therefore exists as multiple stereoisomers
- The clinically used form is primarily associated with specific stereochemical configurations, particularly the threo isomers
Pharmacological chemical class
- Central nervous system stimulant
- Norepinephrine–dopamine reuptake inhibitor (NDRI)
Structural significance
Methylphenidate is structurally distinct from amphetamine and methamphetamine. Rather than being a phenethylamine, it is built around a piperidine ring attached to a phenylacetate ester framework.
Physical characteristics
- Pure methylphenidate is a white crystalline solid
- Commonly formulated as methylphenidate hydrochloride
- Moderately soluble in water in its salt form
Relationship to other stimulants
Although often grouped with stimulant medications, methylphenidate differs structurally from:
- Amphetamine
- Methamphetamine
- MDMA




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