3,6,9-trihydroxy-3-methyl-3,4-dihydrocyclohepta[c]pyran-7(1H)-one InChI=1/C11H12O5/c1-11(15)4-6-2-9(13)10(14)3-8(12)7(6)5-16-11/h2-3,12,15H,4-5H2,1H3,(H,13,14 cyclohepta[c]pyran-7(1H)-one, 3,4-dihydro-3,6,9-trihydroxy-3-methyl-