81319-50-8 Antibiotic F1 Tetrocarcin F-1 Tetrocarcin F1 Tetronolide, 17-O-(2,3,4,6-tetradeoxy-4-((methoxycarbonyl)amino)-3-C-methyl-3-nitro-beta-D-xylo-hexopyranosyl)- Tetronolide, 17-O-(2,3,4,6-tetradeoxy-4-((methoxycarbonyl)amino)-3-C-methyl-3-nitrohexopyranosyl)-