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7-Dehydrocholesterol (7-DHC), a 5,7-conjugated diene sterol is a biosynthetic precursor of cholesterol. It helps in the production of vitamin D3 when exposed to ultraviolet B (UVB) radiation.
D 5103 (OTTO) 7-Dehydrocholesterol, ≥95% (HPLC) Cas 434-16-2 - used in chemical research.