反式-2，3-二氢-7-羟基-3-(4-羟基苯基)-4H-苯并吡喃-4-醇(isomer 1)

反式-2，3-二氢-7-羟基-3-(4-羟基苯基)-4H-苯并吡喃-4-醇(isomer 1)

trans-2，3-dihydro-7-hydroxy-3-(4-hydroxyphenyl)-4H-benzopyran-4-ol(isomer 1)