Ahmad Khan, S., & M. Asiri, A. (2014). Selective Reduction of a,b-Unsaturated Steroidal Carbonyl Compounds by NaBH4 in Presence of Guanidine Hydrochloride in Dioxane. Asian Journal of Chemistry, 26(19), 6331–6334. https://doi.org/10.14233/ajchem.2014.16363