Human BACE-1 in complex with 7-ethyl-N-((1S,2R)-2-hydroxy-3-(((3-(methyloxy)phenyl(methyl)amino)-1-(phenylmethyl)propyl)-1-methyl-3,4- dihydro-1H-(1,2,5)thiadiazepino(3,4,5-hi)indole-9-carboxamide 2,2- dioxide