Rajachandrasekhar, V. et al. 2014. Synthesis of N-(3,4,10,10a-Tetrahydro-2H-1,9-dioxa-4a-azaphenanthrene- 6-yl)alkyl and Aryl Sulfonamides. Asian Journal of Chemistry. 26, 16 (Aug. 2014), 5263–5267. DOI:https://doi.org/10.14233/ajchem.2014.17017.