Create multiple solvates in a single request.

The Salt & Solvate library requires the salt and solvate forms feature to be enabled on your tenant; contact your Benchling representative to turn it on. Creating an entry requires tenant admin permissions. Structures are neutralized (uncharged) on creation and are immutable afterwards. The library is limited to 2000 non-archived entries, and each structure is limited to 50 atoms. Names, structures, and the optional code must each be unique (case-insensitive for names and codes) across all salts and solvates in the tenant. Archived entries still reserve their name and structure, so an archived match must be unarchived rather than recreated.