From Solanum aviculare Forst F., S. sodomeum L., S. xanthocarpum Schrad & Wendl., Solanaceae: Bell, Briggs, J. Chem. Soc. 1942, 1; Briggs et al., ibid. 1942, 3; Kuhn, Lw, Ber. 88, 289 (1955). Isoln from other S. spp: Briggs, Cambie, J. Chem. Soc. 1958, 1422; Briggs et al., ibid. 1961, 4645. Paper chromatography: Szendey, Arch. Pharm. 290, 563 (1957). Structure: Briggs et al., J. Chem. Soc. 1963, 2848. Enzymic decompn: Guseva, Pasechnichenko, Biokhimiya 24, 563 (1959).