biostudies-literatureUnknown71(Pt 3)Beghidja NThe lactone ring in the title mol-ecule, C15H22O3 (systematic name: 3,4a,8-tri-methyl-dodeca-hydro-azuleno[6,5-b]furan-2,5-dione), assumes an envelope conformation with the methine C atom adjacent to the the methine C atom carrying the methyl substituent being the flap atom. The other five-membered ring adopts a twisted conformation with the twist being about the methine-methyl-ene C-C bond. The seven-membered ring is based on a twisted boat conformation. No specific inter-actions are noted in the the crystal packing.Acta crystallographica. Section E, Crystallographic communicationso162https://www.ebi.ac.uk/biostudies/studies/S-EPMC4350757biostudies-literatureCrystal structure of pseudoguainolide.PMC4350757Benayache SKariuki BMKnight DWBeghidja NBenayache FfalseCrystal structure of pseudoguainolide.The lactone ring in the title mol-ecule, C15H22O3 (systematic name: 3,4a,8-tri-methyl-dodeca-hydro-azuleno[6,5-b]furan-2,5-dione), assumes an envelope conformation with the methine C atom adjacent to the the methine C atom carrying the methyl substituent being the flap atom. The other five-membered ring adopts a twisted conformation with the twist being about the methine-methyl-ene C-C bond. The seven-membered ring is based on a twisted boat conformation. No specific inter-actions are noted in the the crystal packing.2015-01-01T00:00:00Z2015 Mar2024-10-14T22:34:24.107Z2019-03-27T01:47:39ZS-EPMC43507572584422710.1107/S2056989015002510