An analysis of FDA-approved drugs: natural products and their derivatives. – PubMed – NCBI by Michael Kinch · Published February 1, 2016 · Updated February 1, 2016 Drug Discov Today. 2015 Jan 21. pii: S1359-6446(15)00031-8. doi: 10.1016/j.drudis.2015.01.009. [Epub ahead of print] Source: An analysis of FDA-approved drugs: natural products and their derivatives. – PubMed – NCBI