1,2-(Di-m-hydroxyphenyl)-3,5-dioxo-4-n-butylpyrazolidin [German] 1,2-Bis(m-hydroxyphenyl)-4-butyl-3,5-pyrazolidinedione 1242-28-0 3,5-Pyrazolidinedione, 1,2-bis(m-hydroxyphenyl)-4-butyl- 5-24-05-00404 (Beilstein Handbook Reference) BRN 0327720 G 27463