2,3-Dihydro-3-(ethoxymethyl)-5H-1,4-benzodioxepin-5-one 22891-60-7 5-19-05-00508 (Beilstein Handbook Reference) 5H-1,4-Benzodioxepin-5-one, 2,3-dihydro-3-(ethoxymethyl)- BRN 1429202