| Inoue, T., Nakata, R., Savitzky, A.H., Yoshinaga, N., Mori, A., and Mori, N. 2020. Variation in bufadienolide composition of parotoid gland secretion from three taxa of Japanese toads. J. Chem. Ecol. 46:997-1009. |
| |
| Tian, H.Y., Ruan, L.-J., Yu, T., Zheng, Q.-F., Chen, N.-H., Wu, R.-B., Zhang, X.Q., Wang, L., Jiang, R.W., and Ye, W.C. 2017. Bufospirostenin A and bufogargarizin C, steroids with rearranged skeletons from the toad Bufo bufo gargarizans. J. Nat. Prod. 80:1182-1186. |
| |
| Chen, H., Meng, Y.-H., Guo, D.-A., Liu, X., Liu, J.-H., and Hu, L.-H. 2015. New cytotoxic 19-norbufadienolide and bufogargarizin isolated from Chan Su. Fitoterapia. 104:1-6. |
| |
| Wang, S.W., Duan, L.-R., Cao, W., Xie, Y.-H., Yuan, J.-N., Li, H., and Zhang, X.-K. 2015. Simultaneous quantitative determination of nine bufadienolides in traditional Chinese medicinal toad skin from different regions of China by high-performance liquid chromatographyphotodiode array detection. Pharm. Anal. Acta. 6:1-6. |
| |
| Wang, Y.-M., Li, Z.-Y., Wang, J.-J., Wu, X.-Y., Gao, H.-M., and Wang, Z.-M. 2015. Bufadienolides and polyhydroxycholestane derivatives from Bufo bufo gargarizans. J. Asian Nat. Prod. Res. 17:364-376. |
| |
| Li, H.-Y., Zhang, L.-Z., Wang, S.-H., Deng, Y., and Jin, X.-Q. 2013. ?Two new bufotoxins from the skin of Bufo bufo gargarizans. Chin. Chem. Lett. 24:731-733. |
| |
| Tian, H.Y., Luo, S.L., Liu, J.S., Wang, L., Wang, Y., Zhang, D.M., Zhang, X.Q., Jiang, R.W., and Ye, W.C. 2013. C23 steroids from the venom of Bufo bufo gargarizans. J. Nat. Prod. 76:1842-1847. |
| |
| Tian, H.Y., Wang, L., Zhang, X.Q., Zhang, D.M., Wang, Y., Liu, J.S., Jiang, R.W., and Ye, W.C. 2010b. New bufadienolides and C23 steroids from the venom of Bufo bufo gargarizans. Steroids. 75:884-890. |
| |
| Tian, H.Y., Wang, L., Zhang, X.Q., Wang, Y., Zhang, D.M., Jiang, R.W., Liu, Z., Liu, J.S., Li, Y.L., and Ye, W.C. 2010a. Bufogargarizins A and B: two novel 19-norbufadienolides with unprecedented skeletons from the venom of Bufo bufo gargarizans. Chem. Eur. J. 16:10989-10993. |
| |
| Gao, H.M., Zehl, M., Kaehlig, H., Schneider, P., Stuppner, H., Banuls, L.M.Y., Kiss, R., and Kopp, B. 2010. Rapid structural identification of cytotoxic bufadienolide sulfates in toad venom from Bufo melanosticus by LC-DAD-MS and LC-SPE-NMR. J. Nat. Prod. 73:603-608. |
| |
| Hutchinson, D.A., Mori, A., Savitzky, A.H., Burghardt, G.M., Wu, X., Meinwald, J., and Schroeder, F.C. 2007. Dietary sequestration of defensive steroids in nuchal glands of the Asian snake Rhabdophis tigrinus. Proc. Natl. Acad. Sci. U.S.A. 104:2265-2270. |
| |
| Cunha-Filho, G.A., Schwartz, C.A., Resck, I.S., Murta, M.M., Lemos, S.S., Castro, M.S., Kyawc, C., Pires, Jr., O.R., Leite, J.R.S., Bloch, Jr., C., and Schwartz, E.F. 2005. Antimicrobial activity of the bufadienolides marinobufagin and telocinobufagin isolated as major components from skin secretion of the toad Bufo rubescens. Toxicon. 45:777-782. |
| |
| Daly, J.W., Noimai, N., Kongkathip, B., Kongkathip, N., Wilham, J.M., Garraffo, H.M., Kaneko, T., Spande, T.F., Nimit, Y., Nabhitabhata, J., and Chan-Ard, T. 2004. Biologically active substances from amphibians: preliminary studies on anurans from twenty-one genera of Thailand. Toxicon. 44:805-815. |
| |
| Maciel, N.M., Schwartz, C.A., Pires, O.R. Jr., Sebben, A., Castro, M.S., Sousa, M.V., Fontes, W., and Schwartz, E.N.F. 2003. Composition of indolealkylamines of Bufo rubescens cutaneous secretions compared to six other Brazilian bufonids with phylogenetic implications. Comp. Biochem. Physiol. B. 134:641-649. |
| |
| Gella, I.M., Shabanov, D.A., Leont'ev, D.A., Levin, M.G., Shishkin, O.V., Baumer, V.N., and Lakin, E.E. 1995. Study of the bufadienolides of the skin secretion of green toads (Bufo viridis Laur, 1758). Pharm. Chem. J. 29:41-43. |
| |
| Croce, G., and Bolognani, L. 1975. Lipid components in the skin secretions of amphibia. I. Cholesterol. Comp. Biochem. Physiol. B. 52:307-309. |
| |
| Cei, J.M., Erspamer, V., and Roseghini, M. 1968. Taxonomic and evolutionary significance of biogenic amines and polypeptides in amphibian skin. II. Toads of the genera Bufo and Melanophryniscus. Syst. Zool. 17:232-245. |
| |
| Erspamer, V., Vitali, T., Roseghini, M., and Cei, J.M. 1965. 5-Methoxy- and 5-hydroxy-indolealkylamines in the skin of Bufo alvarius. Experientia. 21:504. |
| |
| Erspamer, V., Bertaccini, G., and Urakawa, N. 1964. Biogenic amines and active polypeptides in the skin of ten Japanese amphibian species. Japn. J. Pharmacol. 14:468-473. |
| |
| Barbier, M., Bharucha, M., Chen, K.K., Deulofeu, V., Iseli, E., Jäger, H., Kotake, M., Rees, R., Reichstein, T., Schindler, O., and Weiss, E. 1961. Papierchromatographische prüfung weiterer krötensekrete. Krötengifte, 25. Helvet. Chim. Acta. 44:362-367. |
| |
| Henderson, F.G., Welles, J.S., and Chen, K.K. 1960. Parotoid secretions of Bufo blombergi and B. peltocephalus. Proc. Soc. Exp. Biol. Med. 104:176-178. |
| |
| Erspamer, V. 1959. Isolation of bufoviridine from the skin of Bufo viridis and its identification as dihydrobufothionine. Biochem. Pharmacol. 2:270-275. |
| |
| Deulofeu, V., and Duprat, E. 1944. The basic constituents of the venom of some South American toads. J. Biol. Chem. 153:459-463. |
| |
