(4S,6R,7S,8S,10R,11S,16R)-1-oxo-3(10),8(16)-diepoxy-16-methylprop-1Z-enyl-16-methoxygermacra-2-en-6(12)-olide
(4s,6r,7s,8s,10r,11s,16r)-1-oxo-3(10),8(16)-diepoxy-16-methylprop-1z-enyl-16-methoxygermacra-2-en-6(12)-olide