thiamine hydrochloride unit

  • 1Chondroitin sulfate — Chemical structure of one unit in a chondroitin sulfate chain. Chondroitin 4 sulfate: R1 = H; R2 = SO3H; R3 = H. Chondroitin 6 sulfate: R1 = SO3H; R2, R3 = H …

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