((2R,3R,4R,5R)-5-(4-amino-5-deuterio-pyrrolo(2,1-f)(1,2,4)triazin-7-yl)-5-cyano-3,4-bis(2-methylpropanoyloxy)tetrahydrofuran-2-yl)methyl 2-methylpropanoate hydrobromide
((2r,3r,4r,5r)-5-(4-amino-5-deuterio-pyrrolo(2,1-f)(1,2,4)triazin-7-yl)-5-cyano-3,4-bis(2-methylpropanoyloxy)tetrahydrofuran-2-yl)methyl 2-methylpropanoate hydrobromide