Proposed structures for rhodomycin D, daunorubicin, doxorubicin and their derivatives. Column R5: a, l-daunosamine; b, 4-epi-l-daunosamine; c, l-ristosamine; d, 4-epi-l-vancosamine; e, 3-N-methyl-l-daunosamine; f, 3-N-methyl-4-epi-l-daunosamine; g, 3-N-methyl-l-ristosamine; h, l-rhodosamine; i, d-olivose; j, l-olivose; k, l-digitoxose; l, d-digitoxose; m, l-rhamnose.