19-Deformyl-4''-deoxydesmycosin 85382-81-6 Tmc 015 Tmc-015 Tylosin, 4A-O-de(2,6-dideoxy-3-C-methyl-alpha-L-ribo-hexopyranosyl)-6-de(2-oxoethyl)-4C-deoxy-6-methyl-