(λmax = 470 nm) were found. When the rubropunctatin and monascorubrin were dissolved in methanol, two new yellow fluorescent compounds were also observed. The results indicated that the reaction of rubropunctatin and monascorubrin with methanol or d4-methanol occurred. The yellow fluorescence pigments were isolated and purified from the red yeast rice. Structures were elucidated by ESI-MS, ESI-MS/MS, and NMR
如红麴
甲醇提取物的HPLC分析的结果是,与类似的黄色荧光光谱两个新的橙色
颜料(λ EX = 472纳米,λ
EM = 535纳米)和紫外吸收光谱(λ最大 = 470纳米)中发现。当将rubropunctatin和monascorubrin溶解在
甲醇中时,还观察到两种新的黄色荧光化合物。结果表明,魔果素和莫那布红素与
甲醇或d 4-
甲醇发生了反应。从
红曲米中分离和纯化黄色荧光
颜料。通过ESI-MS,ESI-MS / MS和NMR光谱阐明了结构。高分辨率质谱表明分子式为C22 H 26 O 6和C 24 H 30 O 6。两种新的黄色荧光
颜料的结构分别命名为莫那
酚-甲氧基A和莫那
酚-甲氧基B,分别与rubropunctatin和monascorubrin相似。然而,莫那非
酚-甲氧基A和莫那非
酚-甲氧基B中的羟基和甲氧基分别被rubropunctatin和monascorubrin中的共轭酮羰基取代。