2,5-Dimethoxy-4-propylamphetamine
2,5-Dimethoxy-4-propylamphetamine (DOPR) is a psychedelic drug of the phenethylamine and amphetamine chemical classes. It was first synthesized by Alexander Shulgin, and was described in his book PiHKAL (Phenethylamines i Have Known And Loved). Shulgin described DOPR is a "heavy duty psychedelic", complete with alterations of the thought process and visual distortion.[1] Very little data exists about the pharmacological properties, metabolism, and toxicity of DOPR.
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| Other names | 2,5-Dimethoxy-4-propylamphetamine | 
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| Formula | C14H23NO2 | 
| Molar mass | 237.343 g·mol−1 | 
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The alternative structural isomer DOIP, with a 4-isopropyl substitution, is also known but is around ten times weaker than DOPR, with an active dose of some 20–30 mg (as compared to 2–5 mg for DOPR).[1]

Structure of DOIP
References
    
- Shulgin A, Shulgin A (September 1991). PiHKAL: A Chemical Love Story. United States: Transform Press. p. 978. ISBN 0-9630096-0-5.
 
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