2-Naphthalenecarboxylic acid, 1-hydroxy-4-(1-hydroxy-3-oxo-1H,3H-naphtho(1,8-cd)pyran-1-yl)-, methyl ester 43000-19-7 EINECS 256-043-2 Methyl 1-hydroxy-4-(1-hydroxy-3-oxo-1H,3H-naphtho(1,8-cd)pyran-1-yl)-2-naphthoate