IUPAC:(1S,4R,5S,12S,13R)-5,13,16,18-tetrahydroxy-4,12-bis(4-hydroxyphenyl)-3,11,21-trioxapentacyclo[11.8.0.0^{1,10}.0^{2,7}.0^{15,20}]henicosa-2(7),9,15(20),16,18-pentaene-8,14-dione
IUPAC:(1S,4R,5S,12S,13R)-5,13,16,18-tetrahydroxy-4,12-bis(4-hydroxyphenyl)-3,11,21-trioxapentacyclo[11.8.0.0^{1,10}.0^{2,7}.0^{15,20}]henicosa-2(7),9,15(20),16,18-pentaene-8,14-dione