200497-99-0 7,17,19-Trioxabicyclo[13.4.1]eicosa-2,4,10,12-tetraen-6-one, 8-[(1S,2R,3S)-3-[(2R,4R,5R,6R)-4-[(2,6-dideoxy-.beta.-D- arabino-hexopyranosyl)oxy]tetrahydro-2-hydroxy-5,6-dimethyl- 2H-pyran-2-yl]-2-hydroxy-1-methylbutyl]-20-hydroxy-9-methoxy -1,3,13-trimethyl-16-pentyl-, (1S,2E,4E,8R,9S,10E,12E,15S,16S,20S)- Formamicin NSC705339