1. Guthikonda R N, Cama L D, Quesada M, Woods M F, Salzmann T N and Christensen B G 1987 Pure Appl. Chem. 59 455
2. Nadkarni A K and Nadkarni K M 1976 Indian Materia Medica Bombay Popular Prakashan 1 101
3. Mehdi S H, Hashim R, Ghalib R M, Fátima M, da Silva C G, Sulaiman O, Rahman S Z, Murugaiyah V and Marimuthu M M 2011 J. Mol. Struct. 1006 318
4. Jamroz M H 2004 In Vibrational Energy Distribution Analysis: VEDA 4 Program (Warsaw)
5. Frisch M J, Trucks G W, Schlegal H B, Scuseria G E, Robb M A, Cheeseman J R, Montgomery Jr. J A, Vreven T, Kudin K N, Burant J C, Millam J M, Iyengar S S, Tomasi J, Barone V, Mennucci B, Cossi M, Scalmani G, Rega N, Petersson G A, Nakatsuji H, Hada M, Ehara M, Toyota K, Fukuda R, Hasegawa J, Ishida M, Nakajima T, Honda Y, Kitao O, Nakai H, Klene M, Li X, Knox J E, Hratchian H P, Cross J B, Adamo C, Jaramillo J, Gomperts R, Stratmann R E, Yazyev O, Austin A J, Cammi R, Pomelli C, Ochterski J W, Ayala P Y, Morokuma K, Voth G A, Salvador P, Dannenberg J J, Zakrzewski V G, Dapprich S, Daniels A D, Strain M C, Farkas O, Malich D K, Rabuck A D, Raghavachari K, Foresman J B, Ortiz J V, Cui Q, Baboul A G, Clifford S, Cioslowski J, Stefanov B B, Liu G, Liashenko A, Piskorz P, Komaromi I, Martin R L, Fox D J, Keith T, Al-Laham M A, Peng C Y, Nanayakkara A, Challacombe M, Gill P M W, Johnson B, Chen W, Wong M W, Gonzalez C and Pople J A 2004 Gaussian (Wallingford CT: Gaussian Inc.)