(3aR,4R,6S,6aS)-methyl 4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d]isoxazole-6-carboxylate
(3aR,4R,6S,6aS)-methyl 4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d]isoxazole-6-carboxylate