1H-Naphtho(2,1-b)pyran-8-carboxylic acid, 3-(diethylamino)-1-oxo- 3-(Diethylamino)-1-oxo-1H-naphtho(2,1-b)pyran-8-carboxylic acid 5-18-12-00405 (Beilstein Handbook Reference) 57944-63-5 BRN 1657030