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Solvent option is introduced
    User can select the system default solvent (all) to the query, namely all combine to a search in the library, can also choose to find the solvent used for himself.All solvents for queries, faster than the query with a certain specific solvent to slow.
    Early a few literature did not give a test of 13 c - NMR solvent, so there are a small number of compounds in libraries of 13 c - NMR without solvent.
    We have to improve the query algorithm, if choose all solvent to query, also can complete within a few seconds a precise inquiry.
    Suggest the user in selecting solvent, adopting the system default values.

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