Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q21067889> ?p ?o }
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- Q21067889 abstract "This is a list of methylphenidate (MPH or MPD) analogues. Regular methylphenidate can come in several varieties. Including: the racemate, the enantiopure (dextro or levo) of its stereoisomers; erythro or threo (either + or -) among its diastereoisomers & lastly the isomers S,S; S,R/R,S or R,R. The variant with optimized efficacy is not the usually attested generic or common pharmaceutical brands (e.g. Ritalin, Daytrana etc.) but the (R,R)-dextro-(+)-threo. Which has a binding profile on par with or better than that of cocaine. (Note however the measure of five fold (5×) discrepancy in the entropy of binding at their presumed shared target binding site, which may account for the higher abuse potential of cocaine over methylphenidate despite affinity for associating; i.e the latter dissociates more readily once bound despite efficacy for binding).Also of note is that methylphenidate in demethylated form is acidic; a conformation known as ritalinic acid. This gives the potential to yield a conjugate salt form effectively protonated by a salt nearly chemically duplicate/identical to its own structure; creating a "methylphenidate ritalinate".The carboxymethyl (methyl acetate) has sometimes been replaced with similar length ketones to increase duration. For instance, the methoxycarbonyl has had examples of having been replaced with an alkyl group (such as Kozikowski showed with RTI-31 n-propyl residue. c.f.)Desoxypipradrol (and thus Pipradrol, including such derivatives as AL-1095, Diphemethoxidine, SCH-5472 & D2PM), and even mefloquine, 2-benzylpiperidine & rimiterol could be considered vaguely related structurally, with the former ones also functionally so, as loosely analogous compounds.Enpiroline is one further example, loosely related by being based on the 2-benzylpiperidine skeleton, although in its case it is actually heteroaromatic; also of note are etoxadrol and dioxadrol.Pethidine (Meperidine) is a loose structural analog (being rather between methylphenidate and certain piperidine phenyltropanes) which, though considered functionally an opioid, is also shown to have dopaminergic reuptake qualities.".
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