145594-18-9 Carbamic acid, (6-(2,3,5,6,8,9,11,12-octahydro-7H-1,4,10,13,7-benzotetraoxaazacyclopentadecin-7-yl)-6-oxohexyl)-, 1,1-dimethylethyl ester N-(N'-tert-Butoxycarbonyl-6-aminohexanoyl)benzoaza-15-crown-5