The dried boldo leaves which are obtained from Peumus Boldo, Mol. (family Monimiaceae)3), a fragrant tree that is native to Chili, yielded about 2 p.c. of a volatile oil upon distillation. Its odor is cymene-like and also recalls that of the Baltimore wormseed oil.
Properties. d16o0,915 to 0,9567; aD - - 1° 40' to +0°28'; nD80o1,47928; A.V. 2,4; E.V. 11,2; soluble in 8 to 9 vol. of 70 p.c. alcohol. Occasionally the solution is slightly turbid, due to the separation of paraffin.
Composition. The presence of the following substances was demonstrated by Schimmel & Co.4): p-cymene (m.p. of hydroxy isopropyl benzoic acid 154 to 156°; m.p. of isopropenyl benzoic acid 253 to 255°), cineol (m.p. of iodol compound 119 to 120°), and ascaridol, C10H16O2. For the properties and constitution of this substance see Baltimore wormseed oil, p. 362. Cymene and cineol constituted about 30 p.c. of the oil, ascaridol about 40 to 45 p.c. In addition there are present a terpene that boils at about 170° but which has not been characterized, also traces of a phenol which, in alcoholic solution, gives a dirty green color with ferric chloride.
2) Journ. f. prakt. Chem. II. 72 (1905), 243.
3) The genuine boldo leaves are frequently confounded with those of Cryptocaria Peumus, Nees. F.W.Neger, Pharm. Zentralh. 42 (1901), 461.
*) Schimmel's Bericht April 1888, 43; Report of Schimmel & Co. October 1907, 19.
Very different in properties and composition, and hence in all probability of different botanical source, was an oil prepared and investigated by E. Tardy1); yield almost 2p.c; d 0,876; aD - 6° 30'. The following constituents were ascertained: a-pinene (m.p. of chlorhydrate 125°), dipentene (m.p. of dichlor-hydrate 50 ), terpineol, cuminic aldehyde, eugenol, sesquiterpenes and an ester of acetic acid.