. . . . . . . . "Methyl (2E)-4-{[(4R,4aS,7R,7aR,12bS)-3-(cyclopropylmethyl)-4a,9-dihydroxy-2,3,4,4a,5,6,7,7a-octahydro-1H-4,12-methano[1]benzofuro[3,2-e]isoquinolin-7-yl]amino}-4-oxobut-2-enoate" . . . "beta-Funaltrexamine" . . . . . . . . "\u03B2-Funaltrexamine" . . . "\u03B2-FNA" . "Beta-Funaltrexamine" . "''beta''-Funaltrexamine" . . . "Methyl (2E)-4-{[17-(cyclopropylmethyl)-3,14-dihydroxy-4,5\u03B1-epoxymorphinan-6\u03B2-yl]amino}-4-oxobut-2-enoate" . "Beta-Funaltrexamine" .