1-N-butyl-4-hydroxy-5-methyl-2-(N-butyl-3-hydroxy-5-(2-hydroxyethyl)pyrrolyl-2-methylidene)-2H-pyrrolin-3-one
1-n-butyl-4-hydroxy-5-methyl-2-(n-butyl-3-hydroxy-5-(2-hydroxyethyl)pyrrolyl-2-methylidene)-2h-pyrrolin-3-one