O OH OH OH Ni, Br O茜素 NH2 O OH 分散蓝 NH 标准还原蓝 蒽醌染料Organic Chemistry Organic Chemistry Xiamen Xiamen University University O O OH OH O O HN NH O O O O NH 2 Br NH 2 OH OH 茜素 分散蓝 标准还原蓝 蒽醌染料