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Answer: streptomycins
Answer	Crossword Clue
streptomycins	STREPTOMYCIN, an antibiotic produced by the soil bacterium Streptomyces griseus, which was the first drug to be successful against tuberculosis but is now chiefly used with other drugs because of its toxic effects

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.

Answer: streptomycins