Trispiro[furan-2(3H),2'-[2H]cyclopenta[b]furan-5'(3'H),14''-[1H,14H]indeno[4,5-b]pyrano[3'',4'':2',3']cyclopenta[1',2':5,6]naphtho[1,2-i]phenazine-3''(4''H),2'''(3'''H)-furan]-13'',21''-dione,3'a,4,4',4''',4''a,5,5'',5''',6',6'',6'a,6''a,6''b,7'',8'',8''a