"an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections"@en-us . . "an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections"@en-us . "Achromycin"@en-us . . . . . . "103490400"@en-us . . "104246076"@en-us . "104416530"^^ . "04416530-n"^^ . . . "tetracycline"@en-us . . "0"^^ . "0"^^ . "tetracycline"^^ . .