label: N(1),N(3)-diethyl-5-(5'-(N(1''),N(3'')-diethyl-2,4,6-trioxo-1,2,3,4,5,6-hexahydropyrimidin-5''-ylidene)-penta-1'3'-diene-1'-yl)barbituric acid
label_lc: n(1),n(3)-diethyl-5-(5'-(n(1''),n(3'')-diethyl-2,4,6-trioxo-1,2,3,4,5,6-hexahydropyrimidin-5''-ylidene)-penta-1'3'-diene-1'-yl)barbituric acid