MLD-41
| Clinical data | |
|---|---|
| Other names | MLD-41; N1-Methyl-Lysergic Acid Diethylamide; 1-Methyl-LSD; 1-Methyl-N,N-Diethyllysergamide; Methyl-LSD | 
| Routes of administration  | Oral | 
| Drug class | Serotonergic psychedelic; Hallucinogen | 
| Pharmacokinetic data | |
| Metabolism | Hepatic | 
| Excretion | Renal | 
| Identifiers | |
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| CAS Number | |
| PubChem CID | |
| ChemSpider | |
| CompTox Dashboard (EPA) | |
| Chemical and physical data | |
| Formula | C21H27N3O | 
| Molar mass | 337.467 g·mol−1 | 
| 3D model (JSmol) | |
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MLD-41, also known as 1-methyl-LSD, is a derivative of LSD that has about one-third the psychoactive effects. It has been studied in cross-tolerance of LSD.
Metabolism of other 1-methylated ergoloids to their secondary amine derivatives has been frequently noted in mammals.