反式-2，3-二водорода-7-гидрокси-3-(4-гидроксифенил)-4H-бензол并吡喃-4-спирт(isomer 2)
trans-2，3-dihydro-7-hydroxy-3-(4-hydroxyphenyl)-4H-benzopyran-4-ol(isomer 2)
trans-2，3-dihydro-7-hydroxy-3-(4-hydroxyphenyl)-4H-benzopyran-4-ol(isomer 2) 99%