2,5-Methano-4H,5H-pyrano[2,3-d]-1,3-dioxin-6-carboxylic acid, 4a,8a-dihydro-4-methyl-, methyl ester, (2.alpha.,4.beta.,4a.beta.,5.alpha.,8a.beta.)-(-)- 59653-37-1 NSC224069 SARRACENIN Sarrancenia flava Extract