4-(2-(2-(1,3-Benzodioxol-5-yl)-3-((4-(2,6-diisopropylanilino)-4-oxobutanoyl)hydrazono)-2,3-dihydro-4H-chromen-4-ylidene)hydrazino)-N-(2-isobutyl-6-isopropylphenyl)-4-oxobutanamide AIDS-137293 AIDS137293 NSC641208