P-mentha-1, 3, 8-triene

Among the leafy spices, 45 aroma volatiles of desert parsley have been identified, with the major constituents as myristicin, apiole, /3-phellandrene, p-mentha-1,3,8-triene and 4-isopropenyl-l-methylbenzene (MacLeod eta/., 1985). Among these, apiole in particular has a desirable parsley odour character. The leaf stems of celery show three main constituents of volatiles, e.g. apiole (about 23%), 3-butylphthalide (about 22%) and sedanolide (about 24%). The last two possess a strong characteristic celery aroma (MacLeod et al., 1988). Limonene (40.5%), P-selinene (16.3%), cis-ocimene (12.5%) and P-caryophyllene (10.5%) are some of the volatile oil constituents present in celery leaves from Nigeria (Ehiabhi et al., 2003). 

Production By steam distillation of the aerial parts of the parsley plant, including the unripe seeds. Composition A major part of the oil consists of monoterpene hydrocarbons such as a- andP- pinenes, myrcene, limonene, P-phellandrene (see p-mentha-dienes). The occurrence of p-mentha-1,3,8-triene (usually between 20 and 30%) (C,oH,4, Mr 134.22) is characteristic and mainly responsible for Ae organoleptic impression. According to recent investigations a series of other trace components with widely varying structures also contributes to the typical parsley odor. The leaf oil also contains lower concentrations of those compounds that constitute the main components of parsley seed oil (see below). 

The most important odorants of parsley leaves are listed in Table 6.48. An aroma model formulated on the basis of the quantitative data (Table 6.48) was described as clearly parsley-like [88]. Differences between the odour profile of the model and that of parsley leaves were observed for the spicy and the green-grassy notes which were stronger and weaker, respectively, in the model. The parsley-like character of the aroma model was completely lost when p-mentha-l,3,8-triene (no. 1 in Table 6.48) and myrcene (no. 2) were omitted [88],... 

Epoxy-p-mentha-1,3,5-triene-3,7,8-triol 3-Angeloyl, 7,8-bis-(2-methylbutanoyl), in E-30090... 

Methyl-2- l-methylethy[)phenol, 9CL p-Mentha-1,3,5-trien-2-ol p-Cymen-3-ol, SCI. 6-Isopropyl-m-cresol. 3-Hydroxy-4-isopropyltoluene. 3-Hydroxy-p-cymene. Thymol, Thymianic acid obsoL). Thymianic camphor (pbsol2) [89-83-8]... 

P-Elemene, myristicin, and 1,3,8-p-mentha-triene have been found to accumulate in detectable amounts in young undifferentiated cultures of P. crispum cv. Paramount. ... 

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