Himachalanes, Longipinanes, Longifolanes

Bonds between C-1 and C-6 as well as C-1 and C-11 formally convert famesane into the bicyclic skeleton of himachalane with the numbering system adopted from that of famesane. Several himachalanes such as a-himachalene and himachalol are constituents of the oil of cedar wood from Cedrus deodara (Pinaceae). 

7-Cyclohimachalanes are known as longipinanes. They oeeur in various oils of pine wood and some Asteraceae, exemplified by 3-longipinene from Pinus speeies (Pinaceae) and 3-longipinen-5-one from Chrysanthemum vulgare (Asteraceae). 

Longipinanes are differentiated from longifolanes whieh formally and biogeneti-cally also emerge from famesane by eleaving the C-3-C-4 bond and elosing the 

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Along with longifolane- and longipinane-types sesquiterpenes, (-h)-a-himachalene (436), (—)-P-himachalene (437) and (-h)-y-himachalene (438) have been isolated from Scapania undulata (2, 223). All himachalanes isolated are antipodal to those obtained from higher plants. 

Chart 20. Himachalanes, longifolanes, longipinanes, and sativanes found in the Hepaticae... 

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