1. Department of Chemistry; Kakatiya University; Warangal, Telangana INDIA 506009
2. Department of Pharmacology and Toxicology; Kakatiya University; Warangal, Telangana INDIA 506009
3. Division of Natural Products Chemistry (CSIR); Indian Institute of Chemical Technology; Uppal Road Tarnaka, Hyderabad, Telangana INDIA 500007