(3as-cis)-xy;austocystina;AUSTOCYSTIN A FROM ASPERGILLUS USTUS;5h-furo(3’,2’:4,5)furo(3,2-b)xanthen-5-one,3a,12a-dihydro-7-chloro-4,6-dimetho;(3aS)-7-Chloro-3aα,12aα-dihydro-4,6-dimethoxy-5H-furo[3',2':4,5]furo[3,2-b]xanthene-5-one;(3aS,12aR)-3a,12a-Dihydro-7-chloro-4,6-dimethoxy-5H-furo[3',2':4,5]furo[3,2-b]xanthene-5-one;[3aS,(-)]-7-Chloro-3aα,12aα-dihydro-4,6-dimethoxy-5H-furo[3',2':4,5]furo[3,2-b]xanthene-5-one;5H-Furo[3',2':4,5]furo[3,2-b]xanthen-5-one, 7-chloro-3a,12a-dihydro-4,6-dimethoxy-, (3aS,12aR)-