4H-Naphtho(2,3-b)pyran-2-carboxylic acid, 6,7,8,9-tetrahydro-5-hydroxy-4-oxo-10-propyl- 6,7,8,9-Tetrahydro-5-hydroxy-4-oxo-10-propyl-4H-naphtho(2,3-b)pyran-2-carboxylic acid 60400-92-2 Proxicromil Proxicromil [USAN:BAN:INN] Proxicromilum [INN-Latin]