((Dihydroxy-3,4 phenyl)-2 hydroxy-2) ethyl-1 (allyl-3 oxo-2 benzimidazolinyl-1)-4 piperidine 2H-Benzimidazol-2-one, 1,3-dihydro-1-(1-(2-(3,4-dihydroxyphenyl)-2-hydroxyethyl)-4-piperidinyl)-3-(2-propenyl)- DE2275996