Butanamide,N-[3-[[2-[(2,3-dihydro-6-hydroxy-2-oxo-1H-naphtho[2,1-b][1,4]thiazin-5-yl)thio]ethyl]amino]-3-oxopropyl]-2,4-dihydroxy-3,3-dimethyl-,(R)-; FR 901537
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