Pelc, B Synthesis of (4- 14 C) ergosterol and (4- 14 C) ergocalciferol. [electronic resource] - Journal of the Chemical Society. Perkin transactions 1 1972 - 2980-1 p. digital Publication Type: Journal Article ISSN: 0300-922X Standard No.: 10.1039/p19720002980 doi Subjects--Topical Terms: Carbon IsotopesErgocalciferols--chemical synthesisIsotope LabelingMethodsVitamin D--chemical synthesis