IUPAC:16-hydroxy-5,7,11,19-tetraoxapentacyclo[10.8.0.0^{2,10}.0^{4,8}.0^{13,18}]icosa-1(12),2(10),3,8,13(18),14,16-heptaen-20-one
IUPAC:16-hydroxy-5,7,11,19-tetraoxapentacyclo[10.8.0.0^{2,10}.0^{4,8}.0^{13,18}]icosa-1(12),2(10),3,8,13(18),14,16-heptaen-20-one