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n.1.(Chem.) A white crystalline nitrogenous substance, C2H4.(CO)2.NH, obtained by treating succinic anhydride with ammonia gas. It is a typical imido acid, and forms a series of salts. See Imido acid, under Imido.
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Understanding Polyisobutylene Succinimides (PIBSI) and Internal Diesel Injector Deposits," SAE Technical Paper 2013-01-2682, 2013, doi:10.
In contrast, first-generation AEDs that do not appear to be associated with a significant risk of birth defects include the benzodiazepines (clonazepam [Klonopin], clorazepate [Tranxene], diazepam [Valium], and lorazepam [Ativan]) and succinimides (ethosuximide [Zarontin] and methsuximide [Celontin]).
Polyether amines, polyisobutylene amines, and polyisobutylene succinimides as fuel additives reduce the intake valve deposit by 45-60% from the base fuel and lower somewhat the combustion chamber deposit when compared to the base fuel.
The succinimides consist of ethosuximide, methsuximide and phensuximide.