Chemical studies on Citrus Natsudaidai. : Ⅱ. Orange oil of Natsudaidai fruit

The orange oil of Natsudaidai fruit was investigated,by the writer, and the following. Constituents were identifid：Limon（main constituent. About 93％ of total oil） Aldehydes（n-octylaldehyde and n-decylaldehyde） Ester（caprilic ester） Terpen alcohols （linalool,terptneol,geraniol？,citronelol？） Umbelliferon m.p.232°C., C_9H_60_3 Aurapten m.p.68°C.,C_16H_20O_8（aromatic principle） Auraptin m.p.111°C., C_19H_2o0_5（a new cumarin compound） Bergapto m.p.278-279°C.,C_11H_60_4 Sistosterol m.p.137－138°C.,C_28H_470H. Naringin m.p.（83°C.）171°C., C_21H_260_11（4H_20） Lihmonin m.p.290°C.,C_26H_30O_8 The orange oil of Natsudaidai fruit very much resembled the sweet orange oil,although it showed some difference from the grapefruit oil. Among these constituents of Natsudaidai fruit above mentioned,umbelliferon,aurapten,auraptin and bergaptol were proved to be cumarin derivatives....