134933-42-9 1H-Xanthene-2,7-dicarboxylic acid, 4,4a,9,9a-tetrahydro-4,4a-dihydroxy-6-methoxy-3,4,5,8,9a-pentamethyl-1-oxo-, 2-(4-((4-carboxy-3-methoxy-2,5,6-trimethylphenoxy)carbonyl)-3-methoxy-2,5,6-trimethylphenyl) 7-(4-carboxy-3-methoxy-2,5,6-trimethylphenyl) ester, (4alpha,4abeta,9abeta)- Thielocin A1beta