Studies on the Fatty Substances of Umenokigoke (Parmelia tinctorum Despr.)

Abstract

The properties of the oil of Umenokigoke and its components concerning with fatty acid and unsaponifiable matter were studied. The dried sample was extracted with n-hexane. The oil content was 0.5% (weight) of the dried sample. The properties of the n-hexane extract were as follows: dark-green soft solid (27'C), n81.5-D 1.5105. I.N. 84.5, S.V. 133.9, A.V. 2.6. The oil was treated with acetone and neutral oil was obtained as acetone soluble part. The mixed fatty acid was obtained by saponification of the neutral oil. The fatty acid compositions determined by gaschromatography were as follows : C10:0 0.6%, C12:0 0.4%, C14:0 0.7%, C14:1 10.5%, C16:0 13.5%, C18:0 4.8%. C18:1 20.8%, C18:2 44.8%, C20:0 10.8%. C20:1 1.9% and others 1.2%. The unsaponifiable matter was corresponded with 46.7 % of the neutral oil and its sterol content observed by precipitation with digitonin was 14.0% of its weight, and delta5,7-sterol content 0.5%. The main sterol is considered to be delta7-sterol showing the properties mentioned next: I.N. 135.0, m.p. 142.6 degrees C and some remarkable IR absorptions (3440 cm -1, 2900 cm -1 , 1650 cm -1 1460 cm -1, 1375 cm -1 , 820 cm -1, 790 cm -1). The remaining parts of the unsaponifiable matter seemed to be hydrocarbon and white powder showing m.p. 157.4—159.5 degrees C.