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| Other names | Allylpental, Cyclopental, 5-Allyl-5-Δ2-Cyclopentenyl Barbituric Acid |
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| ECHA InfoCard | 100.000.891 |
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| Formula | C12H14N2O3 |
| Molar mass | 234.255 g·mol−1 |
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Cyclopentobarbital sodium (Cyclopal,Dormisan) is abarbiturate derivative invented in the 1940s.[1] It hassedative andanticonvulsant properties, and was used primarily as an anaesthetic inveterinary medicine.[2] Cyclopal is considered similar in effects tophenobarbital but lasts almost three times as long, and is considered a long-acting barbiturate with a fairly slow onset of action.