4,8-Secosenecionan-8,11,16-trione, 15,20-epoxy-15,20-dihydro-12-hydroxy-4-methyl-, (15beta,20R)- 60102-37-6 60409-50-9 CCRIS 5781 Fukinotoxin Fukinotoxin (neutral) PETASITENINE Petasitenine (neutral) Spiro(2,9-dioxa-14-azabicyclo(9.5.1)heptadec-11-ene-4,2'-oxirane)-3,8,17-trione, 7-hydroxy-3',6,7,14-tetramethyl-, (1R-(1R*,4R*(R*),6R*,7R*))-