2-Formylnaphthalene 2-Naphthaldehyde 2-Naphthalenecarboxaldehyde 2-Naphthalenecarboxaldehyde (9CI) 4-07-00-01288 (Beilstein Handbook Reference) 66-99-9 BRN 0507750 EINECS 200-640-2 NAPHTHALENE-2-CARBONITRILE NSC 8557 beta-Formylnaphthalene beta-Naphthaldehyde beta-Naphthylaldehyde beta-Naphthylcarboxaldehyde