(19R)-1-Acetyl-20,21-didehydro-17,19-epoxy-4-methyl-3,4-secocuran-3-one 1-Acetyl-20,21-didehydro-17,19-epoxy-4-methyl-3,4-secocuran-3-one 3,4-Secocuran-3-one, 1-acetyl-20,21-didehydro-17,19-epoxy-4-methyl-, (19R)- 34227-00-4 Strychnobrasiline