? 3,4-Dihydro-7-hydroxy-2(1H)-quinolinone , with CAS number of 22246-18-0, can be called 3,4-Dihydrogen-7-Hydroxy-2(1H)-Quinolinone ; 7-Hydroxy-3,4-dihydro-2(1H)Quinolineone ; 2(1H)-Quindinone,3,4-dohydro-7Hydroxy ; 7-(4-bromo-butoxy)-3,4-dihydro-1H-quinolin-2-one ; 7-Hydroxy-1,2,3,4-tetrahydro-2-quinolinone ; 7-Hydroxy-1,2,3,4-tetrahydroquinoline ; 3,4-dihydro-7-hydroxy quinolin-2(1H)-one . It is a?pale yellow powder.