From Anabasis aphylla L., Chenopodiaceae. Extraction procedure and structure: Orechoff, Menschikoff, Ber. 64, 266 (1931); 65, 234 (1932). Structure: Galinovsky, Jarish, Monatsh. Chem. 84, 199 (1953). Stereochemistry: Edwards et al., Can. J. Chem. 32, 235 (1954); Galinovsky et al., Monatsh. Chem. 86, 1014 (1955). Synthesis: Bohlmann et al., Ber. 90, 653 (1957).