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n. A single-ringed, crystalline organic base, C4H4N2, that forms uracil, cytosine, or thymine and is the parent compound of many drugs, including the barbiturates.

n. Any of several organic compounds derived from or structurally related to pyrimidine, especially the nitrogen bases uracil, cytosine, and thymine.

n. A diazine in which the two nitrogen atoms are in the meta- positions; it is the basis of three of the bases found in DNA and RNA, thymine, uracil and cytosine

n. An organic compound, composed of carbon, hydrogen, and nitrogen, so arranged that the carbon and nitrogen atoms form a ring or chain, as shown in the formula .

n. any of several basic compounds derived from pyrimidine

n. a heterocyclic organic compound with a penetrating odor

"From these results Funk believed the vitamine to belong to a class of substances known as the pyrimidine bases."

organic compound   

purine    amylin    isostructural    combinationof    nucleoside    ungraspable    discrete-time    vasoactive    multi-dimensional    somatostatin