Barbituric acid n. (Chem.) A white, crystalline substance, CH2(CO.NH)2.CO, derived from alloxantin, also from malonic acid and urea, and regarded as a substituted urea.
... veronalsodium (sodium-diethyl-barbiturate) is among the best. It acts quickly, is less depressant and is a safer salt than most of the other newer hypnotics. It is the readily soluble sodium salt of veronal (diethyl-barbituric acid). When combined with any active drug, sodium seems to make it less toxic and less depressant. The dose of this drug is from 0.2 to 0.3 gm. (3 ... — DISTURBANCES OF THE HEART • OLIVER T. OSBORNE, A.M., M.D.
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