Aflatoxin b1; (6ar-cis)(2,3,6a,9a)tetrahydro-4-methoxy-ciclopenta[c]furo[3',2':4,5]furo[2,3-h][z]benzopyran-1,11-dione; 2,3,6aalpha,9aalpha-tetrahydro-4-methoxycyclopenta[c]furo[2',3':4,5]furo[2,3-h]chromene-1,11-dione; Cyclopenta[c]furo[3',2':4,5]furo[2,3-h][1]benzopyran-1,11-dione, 2,3,6a,9a-tetrahydro-4-methoxy-, (6aR-cis).