A radioactive isotope of carbon, commonly used in radiometric dating and tracing biological processes.
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Drotaverin hydrochloride
7-benzyl-4,5,6,7,8,9-hexahydropyrano<2,3-d>azepin-2(3H)-one
5-chloro-2-methoxymethoxy-[carboxyl-(14)C]benzoic acid methyl ester
