Synonyms: 2(5H)-Furanone,5-[2'-(3-furanyl)-4,4',5,5'-tetrahydro-5'-hydroxy-5,5-dimethylspiro[furan-2(3H),7'(3'H)-[2H,8aH-2a,8b]methanofuro[4,3,2-ij][2]benzopyran]-4-yl]-5-methyl-,[2'R-[2'a,2'aa,5'b,7'b[S*(S*)],8'aa,8'ba]]-;Spiro[furan-2(3H),7'(3'H)-[2H,8aH-2a,8b]methanofuro[4,3,2-ij][2]benzopyran],2(5H)-furanone deriv.; Tricoccin S33