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?? ???? >2-Deoxy-4-C-methyl-2-methylene-3,4-O-isopropylidene-L-erythro-pentonic acid d-lactone
2-Deoxy-4-C-methyl-2-methylene-3,4-O-isopropylidene-L-erythro-pentonic acid d-lactone
2-Deoxy-4-C-methyl-2-methylene-3,4-O-isopropylidene-L-erythro-pentonic acid d-lactone ??
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2-Deoxy-4-C-methyl-2-methylene-3,4-O-isopropylidene-L-erythro-pentonic acid d-lactone C??? ??, ??, ??
2-Deoxy-4-C-methyl-2-methylene-3,4-O-isopropylidene-L-erythro-pentonic acid d-lactone ?? ?? ? ???
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2-Deoxy-4-C-methyl-2-methylene-3,4-O-isopropylidene-L-erythro-pentonic acid d-lactone ?? ??
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