Synthesis, NMR, X-ray crystallography and bioactivity of some α-aminophosphonates oleh Gandavaram Syam Prasad, Jadaprolu Radha Krishna, Manubolu Manjunath, Obulam Vijaya Sarathi Reddy, Musali Krishnaiah, Cirandur Suresh Reddy, Vedavati G. Puranik