[1
]Department of Chemistry, National Institute of Technology, Tiruchirappalli 620 015,
India
[2
]Theoretical and Computational Chemistry Laboratory, School of Chemistry, Bharathidasan
University, Tiruchirappalli 620 024, India
[3
]Department of Chemistry, Siddha Central Research Institute, Central Council for Research
in Siddha, Arumbakkam, Chennai 600 106, India
[4
]Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama,
2630 Sugitani, Toyama 930-0194, Japan
[5
]Department of Chemistry, Texas A&M University, College Station, Texas 77842, United
States