From the buds of the black currant (Ribes nigrum, L, Ger. Schwarze Johannisbeere, family Saxifragaceae) Schimmel & Co. 2) obtained a volatile oil with a yield of 0,75 p. c. It had the following properties: d16o0,8741; aD + 2°30'; nD20o1,48585; A.V. 0; E.V. 5,6; soluble in 6,5 vol. or more of 90 p.c. alcohol. This solution is slightly turbid, but the turbidity disappears upon greater dilution (1:10). The oil was pale green as to color and, judging by its odor, contained cymene.
From the leaves Huchard1) obtained a volatile oil which upon hydrolysis yielded quinic acid and a very active oxidase. Constants and other properties of the oil are not enumerated but mention is made of its diuretic properties.
1) A. Neubert, Berl. Berichte 19 (1886), 1824. 2) Report of Schimmel & Co. April 1907, 106.
3) Journal des Praticiens; through The Practitioner l909, 428. According to Pharmaceutical lourn. 82 (1909), 528.