1. For antibacterial activity, see: (a) Kliegel, W. Pharmazie 1978, 33, 331–335;
2. (b) Sivasubramanian, S.; Ravishandran, K.; Muthusubramanian, S.; Chandra, A. C.; Mahendran, V. Sulfur Lett. 1992, 14, 53–59;
3. (c) Sivasubramanian, S.; Amutha, C.; Thirumalaikumar, M.; Muthusubramanian, S. Indian J. Chem., Sect. B: Org. Chem. Incl. Med. Chem. 1996, 35B, 503–504.
4. For another type of activity, see: (d) Johnson, C. R.; Taylor, J. D.; Honn, K. V.; Cheng, S. US Patent US 4, 758, 669. Appl. 859, 694, 05. Chem. Abstr. 1988, 109, 149366a; (f) Kato, K.; Nakano, M.; Richaado, G. K. Jpn. Kokai Tokkyo Koho JP 06,239,737 (30 Aug. 1994); Chem. Abstr. 1995, 122, 1096k; (g) Anana, R. D.; Ng, H.; Hawlett, S. E.; Knaus, E. E. Arch. Pharm. Pharm. Med. Chem. 1997, 330, 53–58; (h) Ellwood, C. W.; Tikhonov, A. Ya. PCT Int. Appl. WO98 03,479. Chem. Abstr. 1998, 128, 153919t; (i) Lee, K. J.; Kim, D. H. Bioorg. Med. Chem. Lett. 1998, 8, 323–326; (j) Tikhonov, A. Ya.; Mazhukin, D. G.; Grigor'eva, L. N.; Khlestkin, V. K.; Voinova, N. N.; Syropyatov, B. Ya.; Shrinkina, S. S.; Volodarsky, L. B. Arch. Pharm. Pharm. Med. Chem. 1999, 332, 305–308.