共 50 条
- [43] SYNTHESIS OF 4,7-DIPHENYL-2H,5H-PYRANO[4,3-B]PYRANE-2,5-DIONE ZHURNAL ORGANICHESKOI KHIMII, 1994, 30 (07): : 999 - 1000
- [47] 3,7,8-Trihydroxy-3-methyl-10-oxo-4,10-dihydro-1H,3H-pyrano[4,3-b]chromene-9-carboxylic acid (fulvic acid) methanol 0.75-solvate ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, 2003, 59 : O1517 - O1518
- [48] 7,8-dihydroxy-3-methyl-10-oxo-1H,10H-pyrano[4,3-b]chromene-9-carboxylic acid ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, 2003, 59 : O1244 - O1245