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Related to barbitone: veronal

barbital, barbitone

a long-acting barbiturate, used as a hypnotic and sedative. Largely replaced by phenobarbital.
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Two 2-mL aliquots of the inhibitor-containing blood were immediately pipetted into polypropylene tubes, on ice, containing 40 mL of cold absolute ethanol (998 mL/L) and 4 mL of the barbitone buffer.