(5R,6S,8R)-(-)-6-isopropyl-3-methyl-8-phenyl-7,9-dioxa-1-azaspiro[4.5]dec-3-ene

(E)-(2R,4S,5R)-(-)-(3-bromo-2-methyl-allyl)-(4-isopropyl-2-phenyl-[1,3]dioxan-5-yl)-amine

(5R,6S,8R)-6-isopropyl-3-methyl-8-phenyl-7,9-dioxa-1-azaspiro[4.5]dec-3-en-2-one

(5R,6S,8R)-1-chloro-6-isopropyl-3-methyl-8-phenyl-7,9-dioxa-1-azaspiro[4.5]dec-3-en-2-one

(3R,4S,5S,6S,8R)-4-hydroxy-6-isopropyl-3-methyl-8-phenyl-7,9-dioxa-1-azaspiro[4.5]decan-2-one