Introduction 2 2,6-Dimethyloctanes 3 Irregular Monoterpenoids 4 Menthanes 5 Cineol Derivatives 6 Camphanes and Isocamphanes 7 Pinanes 8 Caranes 9 Fenchanes 10 Thujanes 11 Ionone Derivatives 12 Iridanes 13 Cannabinoids I4 References NATURAL PRODUCT REPORTS, 1992-D. H. GRAYSON 533 Table 1 Plant species Abies spp. Abies alba Achillea abrotanoides Ambrosia trcfida A r t em isia scoparia Bidens pilosa Buddleia sal vifolia Cestrum nocturnum Chaerophyllum bulbosum spp. Citrus aurantium var. Citrus limoniu var. Osbeck Comptonia peregrina Cymbopogon distans f. Drucocephalum moldavica Elettaria cardamomum Maton. Elsholtzia blanda E. pilosa E. polysracha E. stauntonii Eucalyptus Pscerta Feronia limonia Fil ipendula ulniar ia Fissistigma shangtzeense Gutierrezia surothrae Hyp t is pee tinu ta H . suaveolens Poit. Hyssopus oficinalis Illicium simonsii Juniperus recurvata var. Levisticum ojicinale Lomatium grayi Melaleuca alternjfolia Melissa oficinalis Mentha arvensis Mercurialis Ieiocarpa Micromeria teneriflae Benth. Momordica charantia Monodoru myristica Murraya spp. M . k wangsiensis Ocimum basilicum 0 lear ia p h logo pap pa Origanum mujorana 0. onites Picea abies Karst. Pinus cretacea Kollenicz. Piper nigrum Ribes nigrum Ribes nigrum Rosa cymosa Salvia lavandulaefolia sspp.