Geranyl-isobutyrate

Geranyl Isobutyrate.—This ester is isomeric with the last described, and is quite similar in character, but with a slightly different odour. Its formula is Cj Hj,. OOC(CH)(CHj)2, and it is an oil which boils at 135° to 137° at 13 mm. pressure. 

The most easily definable hop contribution to beer aroma is a floral flavor note that certain hop varieties (not necessarily the traditional "aroma hop" varieties) impart to beer ( ). Indications are (Table I) that the floral compounds linalool and ger-anlol are responsible for this aroma note. Geranyl isobutyrate, though present in the more floral beers, is probably in too low concentration to have a major effect on beer flavor. a-Terplneol is eliminated from consideration for the same reason. Linalool has been reported in beer at an estimated concentration of 34ppb ( 3) by Lindsay and at a concentration of 470ppb ( 7) by Tressl. 

See Geranyl isobutyrate trans-3,7-Dimethyl-2,6-octadienyl isopentanoate. See Geranyl isovalerate... 

Geranyl hexylate. See Geranyl hexanoate Geranylinalool. See Geranyl linalool Geranyl isobutyrate... 

Geranyl butyratej Geranyl formate Geranyl hexanoate Geranyl isobutyrate Geranyl isovalerate... 

Neryl isobutyrate 2345-26-8 Geranyl isobutyrate 2349-07-7 Hexyl isobutyrate 2349-13-5 Heptyl isobutyrate 2351-90-8 Ethyl 2-octenoate 2353-45-9 Fast green FCF FD C Green No. 3... 

Chloromethyltrimethylsilane Dynasylan CC3285 219-061-1 Neryl isobutyrate 219-062-7 Geranyl isobutyrate 219-075-8 Hexyl isobutyrate 219-087-3 Ethyl 2-octenoate 219-091-5 Fast green FCF FDSiC Green No. 3 219-099-9 Bisomer DEGDMA Blemmer PDE-100 Diethylene glycol dimethacrylate MFM-418... 

Allyl cyclohexanevalerate Allyl 10-undecenoate 2-s-Butyl-1 -vinylcyclohexyl acetate Citronellyl crotonate Geranyl butyrate Geranyl isobutyrate Linalyl butyrate Linalyl isobutyrate Neryl isobutyrate Terpinyl butyrate Terpinyl isobutyrate C14H24O4... 

The roots of Echinacea angustifolia usually contain only ca. 0.1% essential oil [5, 14, 15]. Bischoff [16], who reported an essential oil content of 1.25-1.5%, must have used the roots of . pallida for his studies. The main components of the essential oil of . angustifolia are compounds such as dodeca-2,4-diene-l-yl-isovalerate, as well as palmitic and linoleic acids [14]. One other major constituent (44% of the oil) has been identified as pentadeca-l,8Z-diene, a minor one as 1-pentadecene [17]. A further volatile compound, ( )-10-hydroxy-4,10-dimethyl-4,ll-dodecadiene-2-one ( Echinolon ), published as a constituent of "Echinacea angustifolia roots [18], is probably from the adulterant . pallida. Pentadeca-8Z-en-2-one, already reported by Schulte et al. [19] as a major constituent of "Echinacea angustifolia"", is presumably derived from . pallida, since Heinzer et al. [14] found it as one of the main components only in the root oil of . pallida. It is also very probable that this compound is identical with the substance reported by Verelis [20] as geranyl-isobutyrate, because Heinzer et al. [14] failed to detect geranyl-isobutyrate... 

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