1-Naphthaleneacrylic acid, 2-hydroxy-alpha-phenyl-, delta-lactone 13759-56-3 2-Phenyl-3H-naphtho(2,1-b)pyran-3-one 3-Phenyl-5,6-benzocoumarin 3H-Naphtho(2,1-b)pyran-3-one, 2-phenyl- 5-17-10-00728 (Beilstein Handbook Reference) BRN 0210672 Belofor OM