6-Aminocoumarin hydrochloride63989-79-731 % similar Coumarin91-64-531 % similar Isofraxidin486-21-531 % similar Coumarin-6-sulfonyl chloride10543-42-730 % similar 6-Nitrocoumarin2725-81-730 % similar 6,7,8-Trimethoxycoumarin6035-49-030 % similar