Synonyms: (+)-RitterazineB; 22-epi-Ritterazine F; Ritterazine B;Dispiro[furan-2(3H),2'(13'H)-bisfuro[3'',2'':3',4']cyclopenta[1',2':5,6]naphtho[1,2-b:1',2'-i]phenazine-13',2''-[2H]pyran]-5'',11',11'b,16',22'(12'H)-pentol,1',3'',3'a,4,4',4'',4'a,4'b,5,5',5'',6',6'',6'a,7',9',9'a,9'b,10',11',11'a,14'a,15'b,16',17',17'a,18',20',20'a,20'b,21',22',22'a,22'b-tetratriacontahydro-1',5,5,5'',9'a,11'a,12',20'a,22'a-nonamethyl-,(1'S,2S,2''R,3'aS,4'aR,4'bR,5''S,6'aS,9'aS,9'bS,11'R,11'aR,11'bS,12'S,14'aS,15'bR,16'S,17'aR,20'aS,20'bS,22'R,22'aS,22'bR)-