3-Amino-2,3,6-trideoxy-L-ribo-hexose is a specific type of sugar molecule. It's a deoxy sugar, meaning it has fewer oxygen atoms than a typical hexose (a 6-carbon sugar). It's also an amino sugar, containing an amino group (-NH2) at the 3rd carbon.
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Structures of L-daunosamine 1, L-3-epi-daunosamine 2, L-ristosamine 3, L-acosamine 4, and the anthracycline antibiotics daunorubicin 5, doxorubicin 6, carubicin 7, idarubicin 8, and epirubicin 9.