Eremophila serrulata

Sacculatal (155) and its C-9 epimer, isosacculatal, are two diterpenoid dialdehydes which contribute to the pungent odour of the liverwort, Trichocoleopsis sacculata. Their structures bear a resemblance to the sesquiterpenoid drimanes. A diterpenoid analogue of the cadinene group is found in the structure of dihy-droxyserrulatic acid (156), from Eremophila serrulata (Myoporaceae). 

Serrulatanes The most common diterpene skeleton found in Eremophila is that represented hy the hicarbocyclic serrulatane group of compounds (101-104). Essentially, these are isoprenologues of the calamenene sesquiterpenes in which the dimethylallyl derived unit of the acyclic precursor does not participate in cyclisation. The first example of this skeleton was found in dihydroxyserrulatic acid (120) which was isolated from E. serrulata (101). As observed for the calamenenes, the presence of the serrulatane skeleton can be inferred from nmr spectroscopic data. 

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See also in sourсe #XX -- [ , , ]

See also in sourсe #XX -- [ , , ]

See also in sourсe #XX -- [ ]

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