1,3-Cyclobutanedione, 2,2,4,4-tetramethyl-, disemicarbazone 73806-30-1 Disemicarbazone of 2,2,4,4-tetramethylcyclobutanedione Hydrazinecarboxamide, 2,2'-(2,2,4,4-tetramethyl-1,3-cyclobutanediylidene)bis- NSC105740 WLN: L4Y CYTJ AUNMVZ B1 B1 CUNMVZ D1 D1