1-Naphthalenecarboxylic acid, 8-(dihydroxymethyl)-, delta-lactone 1H,3H-Naphtho(1,8-cd)pyran-1-one, 3-hydroxy- 3-Hydroxy-1H,3H-naphtho(1,8-cd)pyran-1-one 5656-90-6 EINECS 227-104-0 NSC 195925