170591-44-3

Dispiro[furan-2(3H),3'-[1H,3H]furo[3'',2'':3',4']cyclopenta[1',2':5,6]naphtho[1,2-b]pyrano[3'',4'':2',3']cyclopenta[1',2':5,6]naphtho[1,2-i]phenazine-15'(24'H),2''(3''H)-furan]-24'-one,4,4',4'',4'a,5,5',5'',6'b,7',8',8'a,9',11',11'a,11'b,12',13',13'a,13'b