Antibiotics

294110 Antibiotics; penicillins and their derivatives with a penicillanic acid structure; salts thereof 294120 Antibiotics; streptomycins and their derivatives; salts thereof 294130 Antibiotics; tetracyclines and their derivatives; salts thereof 294140 Antibiotics; chloramphenicol and its derivatives; salts thereof 294150 Antibiotics; erythromycin and its derivatives; salts thereof 294190 Antibiotics; n.e.c. in heading no. 2941