Synonyms: Dispiro[cyclopropane-1,2'(10'H)-phenanthrene-10',2''-phenanthro[3,4-d][1,3]dioxole]-1',4',6'',9'(3'H,8''H)-tetrone,3',6'-bis(acetyloxy)-4'b,5',6',7',8',8'a,9'',10'',11'',11''a-decahydro-5'',7''-dihydroxy-2,4'b,8',8',8'',8'',11''a-heptamethyl-4''-(1-methylethyl)-,[2'S-[2'a(R*),3'a,4'bb,6'a,8'aa,10'b(R*)]]-; Xanthanthusin C