... -oxo-3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6-spiro-2'-(5 ... -oxo-3,7,19-trioxatetracyclo[15.6.1.14,8.020,24]pentacosa-10,14,16,22-tetraene-6-spiro-2'-(5 ... (53-9)41(50)30(7)56-38;1-24(2)41-27(5)16-17-46(61-41)22-33-19 ... ,30-31,33-45,49-50,52H,11,16,20-24H2,1-10H3;11-14,16-18,24-25,27,29-30,32 ... -44,48-49,51H,15,19-23H2,1-10H3/b13 ...