431077-35-9 Carbamic acid, ((1R)-1-(aminocarbonyl)-2-methylpropyl)-, (3R,4S,5S,6R)-5-methoxy-4-((2R,3R)-2-methyl-3-(3-methyl-2-butenyl)oxiranyl)-1-oxaspiro(25)oct-6-yl ester PPI-2458