1 SPB 4-(4-styryl-phenylcarbamoyl)-butyric acid 1.000 2 TNS N-(trans-4'-nitro-4-stilbenyl)-N-methyl-5-amino-pentanoic acid 0.815 3 18A N-{4-[(E)-2-(4-hydroxy-3,5-dimethylphenyl)ethenyl]phenyl}propanamide 0.731