(4R,4aS,7R,7aR,12bS)-3-(cyclopropylmethyl)-7-(methylamino)-1,2,4,5,6,7,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-4a-ol 、
(E)-3-(furan-3-yl)acryloyl chloride 以44%的产率得到(2E)-N-[(5R,6R)-17-(cyclopropylmethyl)-4,5-epoxy-14-hydroxymorphinan-6-yl]-3-(furan-3-yl)-N-methylprop-2-enamide hydrochloride