| 4-butyl-1,2-diphenyl-4-(hydroxymethyl)-5-pyrazolidinedione |
| 4-butyl-1,2-diphenyl-4-(hydroxymethyl)-3,5-pyrazolidinedione |
| 4-hydroxymethylbutazolidine |
| 4-hydroxymethylphenylbutazone |
| hydroxymethylphenylbutazone |
| 4-butyl-1,2-diphenyl-4-(hydroxymethyl)-5-pyrazolidinedione |
