2H-1-Benzopyran-2-carboxylic acid, 6-chloro-3,4-dihydro-4-hydroxy-, ethyl ester 6-Chloro-4-hydroxychroman-2-carboxylic-acid ethyl ester 72914-10-4 ECHCC Ethyl-6-chloro-4-hydroxychroman-2-carboxylate