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- [3] SYNTHESIS OF 4-(METHYLNITROSAMINO)-1-(3-PYRIDYL)-1-BUTANONE, 4-(CARBETHOXYNITROSAMINO)-1-(3-PYRIDYL)-1-BUTANONE, AND N'-NITROSONORNICOTINE LABELED WITH TRITIUM IN THE PYRIDINE RING [J]. JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS, 1988, 25 (07): : 707 - 716