1. Moffat AC (1986) Clarke’s Isolation and Identification of Drugs, The Pharmaceutical Press, London
2. Archer RA, Blanchard WB, Day WA, Johnson DW, Lavagnino ER, Ryan CW (1977) J Org. Chem. 42:2. 277–2. 284
3. Mar 29, S. 1101
4. Haynes LJ, Todd AR (1950) J Chem Soc 303–308
5. Haynes LJ, Hughes NA, Kenner GW, Todd A (1957) J Chem Soc 3. 727–3. 732