2-(6,11-Dihydro-11-oxodibenz(b,e)oxepin-3-yl)propionic acid 5-18-08-00466 (Beilstein Handbook Reference) 55690-47-6 BRN 1322638 DD-3305 DIBENZ(b,e)OXEPIN-3-ACETIC ACID, 6,11-DIHYDRO-alpha-METHYL-11-OXO-