Constituents of the essential oil of Solidago gigantea Ait. (giant goldenrod)

The hydrodistilled essential oil of aerial parts of S. gigantea was investi gated by GC, CC-MS and NMR spectroscopy. Two samples (1990/91, Warsaw, and 1998, Lodz) yielding 0.55% and 70% of essential oil, were analysed in 1992 and 1998. Ninety constituents (96% of the total oil) were identified in the first sample and 85 (98%) in the second. alpha -Pinene (7.0/4.1%), myrcene (2.5/2.6%), p-cymene (2.2/0.6%), (-)-bornyl acetate (4.4/2.9%), alpha- (6. 1/4.0%) and gamma -gurjunene (2.5/2.1%) (-)-germacrene D (21.6/23.5%), (-)- ledol (1.2/2.1%), eudesma-4(15),7-dien-1 beta -ol (1.9/2.5%) and (-)-cycloc olorenone (8.1/32.4%) are the main constituents. The structures of three ne w sesquiterpenes were established by NMR data: epi-torilenol (5 alphaH, 6 b etaH, 7 alphaH, 8 betaH, 10 alpha -6,8-cycloeudesm-4(15)-en-1 alpha -ol, 0. 4/0.1%), 1,10-seco-eudesma-4(15),5(10)-dien-1-al (0.9%/trace) and cis-eudes m-4(10)-en-1-one (0.2%/trace). Copyright (C) 2001 John Wiley & Sons, Ltd.