Synonyms: Trispiro[furan-2(3H),2'-[2H]cyclopenta[b]furan-5'(3'H),12''(2''H)-furo[3'',2'':3',4']cyclopenta[1',2':5,6]naphth[1,2-b]indeno[4,5-i]phenazine-2'',2'''(3'''H)-furan]-11''(1''H)-one,3'a,3''a,4,4',4''',4''b,5,5'',5''',6',6'',6'a,6''a,7'',9'',9''a,9''b,10'',12''a,13'',14'',14''a,15'',17'',17''a,17''b,18'',19'',19''a,19''b-triacontahydro-4',19''-dihydroxy-5'''-(hydroxymethyl)-1'',3',4',5,5,5''',9''a,17''a,19''a-nonamethyl-,[1''S-[1''a,2''a(R*),3''aa,4''bb,6''aa,9''ab,9''ba,12''b(2'S*,3'R*,3'aR*,4'R*,6'aR*),12''ab,14''aa,17''ab,17''ba,19''b,19''ab,19''ba]]-; 22-epi-Ritterazine W; Ritterazine X;Trispiro[furan-2(3H),2'-[2H]cyclopenta[b]furan-5'(3'H),12''(2''H)-furo[3'',2'':3',4']cyclopenta[1',2':5,6]naphth[1,2-b]indeno[4,5-i]phenazine-2'',2'''(3'''H)-furan]-11''(1''H)-one,3'a,3''a,4,4',4''',4''b,5,5'',5''',6',6'',6'a,6''a,7'',9'',9''a,9''b,10'',12''a,13'',14'',14''a,15'',17'',17''a,17''b,18'',19'',19''a,19''b-triacontahydro-4',19''-dihydroxy-5'''-(hydroxymethyl)-1'',3',4',5,5,5''',9''a,17''a,19''a-nonamethyl-,(1''S,2R,2''S,3'S,3'aS,3''aS,4'S,4''bR,5'R,5'''S,6'aS,6''aS,9''aS,9''bS,12''aR,14''aS,17''