(3R,4R,4aR,4bS,5aR,7R,9aS,12aS)-4,7,10,10-tetramethyl-3,4,4a,4b,5a,6,8,9,9a,10-decahydro-7H,12H-3,12a-epoxybenzo[5,6][1,3]oxazino[2,3-a]isoindole

(3S,4S,4aS,4bS,5aR,7R,9aS,12aR)-4,7,10,10-tetramethyl-3,4,4a,4b,5a,6,8,9,9a,10-decahydro-7H,12H-3,12a-epoxybenzo[5,6][1,3]oxazino[2,3-a]isoindole

(1S,3aS,6S,7aS)-N-(8-mentholyl)-3a,6-epoxy-1-methyl-3a,6,7,7a-tetrahydroisoindoline

(1R,3aS,6S,7aS)-N-(8-mentholyl)-3a,6-epoxy-1-methyl-3a,6,7,7a-tetrahydroisoindoline

(1S,3aS,6S,7R,7aS)-N-(8-mentholyl)-3a,6-epoxy-1,7-dimethyl-3a,6,7,7a-tetrahydroisoindoline