Carbamicacid, [9-[[4,6-dideoxy-2-O-[2,4-dideoxy-3-O-methyl-4-[(1-methylethyl)amino]-a-L-threo-pentopyranosyl]-4-[[(2,6-dideoxy-4-S-methyl-4-thio-b-D-ribo-hexopyranosyl)oxy]amino]-b-D-glucopyranosyl]oxy]-12-[[2,6-dideoxy-3-O-[4,5-dimethoxy-2-[(2-methoxy-1-