|Chemical and physical data|
|Molar mass||493.555 g/mol|
|3D model (JSmol)|
Etanautine, also known as diphenhydramine monoacefyllinate, is an anticholinergic used as an antiparkinsonian agent. It is a 1:1 salt of diphenhydramine with acefylline, similar to the diphenhydramine/8-chlorotheophylline combination product dimenhydrinate.
As with dimenhydrinate, the stimulant effect of the acefylline counteracts the sedative effect from the diphenhydramine, resulting in an improved therapeutic profile.
The 1:2 salt diphenhydramine diacefylline (with two molecules of acefylline to each molecule of diphenhydramine) is also used in medicine, under the brand name Nautamine.
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See also: Receptor/signaling modulators
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