New 1:1 and 2:1 salts in the `DL-norvaline-maleic acid' system as an example of assembling various crystal structures from similar supramolecular building blocks.

New 1:1 and 2:1 salts in the `DL-norvaline-maleic acid' system as an example of assembling various crystal structures from similar supramolecular building blocks.