Synonyms: Fumitremorgin G;Tryptoquivaline G;AC1L4AQK;(3'R,3aS,4S)-3-hydroxy-2,2-dimethyl-3'-(4-oxoquinazolin-3-yl)spiro[3aH-imidazo[1,2-a]indole-4,5'-oxolane]-1,2'-dione;61897-91-4;Spiro(furan-2(5H),9'-(9H)imidazo(1,2-a)indole)-3',5(2'H)-dione, 1',3,4,9'a-tetrahydro-1'-hydroxy-2',2'-dimethyl-4-(4-oxo-3(4H)-quinazolinyl)-, (9'S-(9'alpha(S*),9'abeta))-