A1IYB a1iyb (2~{S},4~{R})-~{N}-[(1~{R})-2-[2-[4-[4-bromanyl-7-cyclopentyl-5-oxidanylidene-10-[[(2~{S})-oxolan-2-yl]methoxy]-6~{H}-benzimidazolo[1,2-a]quinazolin-9-yl]piperidin-1-yl]ethoxy]-1-[4-(4-methyl-1,3-thiazol-5-yl)phenyl]ethyl]-1-[(2~{S})-2-[[1-(dimethylamino)cyclopropyl]carbonylamino]-3,3-dimethyl-butanoyl]-4-oxidanyl-pyrrolidine-2-carboxamide A1IYB