Abstract: A variety of small, guanidino group-containing molecules capable of acting as MC4-R agonists are provided. The compounds have various structures provided herein. The compounds are useful in treating MC4-R mediated diseases and may be formulated into pharmaceutical formulations and compositions.

Abstract: A variety of small, guanidino group-containing molecules capable of acting as MC4-R agonists are provided. The compounds have various structures provided herein. The compounds are useful in treating MC4-R mediated diseases and may be formulated into pharmaceutical formulations and compositions.

Abstract: Methods, materials, and systems for detecting toxins are provided. In one aspect, a toxin contamination detector includes a substrate on which a bar code is printed. The bar code has a first color (e.g., black) that is effective to reflect light from a bar code scanning device to produce a bar code result. A toxin indicator is also included. The toxin indicator has a second color in the absence of toxin, which second color does not substantially affect or alter the bar code result. However, the toxin indicator presents a third color in the presence of toxin which substantially changes the bar code result; thereby indicating the presence of toxin.