(5S)-5-amino-N~2~-[(3S,4S,5S,6S)-3-(dichloromethyl)-1,5,6-trihydroxy-3-methyl-8-oxo-4,4a,5,6,7,8-hexahydro-3H-isochromen-4-yl]-4-oxo-L-norleucinamide