2880-49-1 7H-FURO(3,2-g)(1)BENZOPYRAN-7-ONE, 9-(2,3-EPOXY-3-METHYLBUTOXY)-, (R)-(+)- 7H-Furo(3,2-g)(1)benzopyran-7-one, 9-((3,3-dimethyloxiranyl)methoxy)-, (R)- (9CI) CCRIS 5727 Heraclenin NSC 92228 Prangenin Prengenine