Specifically, vitamin D2 is produced from ergosterol, a compound found in ... UVB rays from the sun convert 7-dehydrocholesterol in the skin to previtamin D3, which then undergoes further ...
The mono-(dimethylaminoethyl) succinyl (MDMAES) ester is a new derivative for rapid, mild, and sensitive electrospray ionization tandem mass spectrometry (ESI-MS/MS) analysis of cholesterol and ...