IUPAC:(3S,7R)-11-(13C)methoxy(1,2,3,4,5,7,9,10,11,12,13,14,15,17,18,19-13C16)-6,8,16,20-tetraoxapentacyclo[10.8.0.0^{2,9}.0^{3,7}.0^{13,18}]icosa-1,9,11,13(18)-tetraene-17,19-dione
IUPAC:(3S,7R)-11-(13C)methoxy(1,2,3,4,5,7,9,10,11,12,13,14,15,17,18,19-13C16)-6,8,16,20-tetraoxapentacyclo[10.8.0.0^{2,9}.0^{3,7}.0^{13,18}]icosa-1,9,11,13(18)-tetraene-17,19-dione