Organic compounds having the structure I are provided where the variables have the values described herein. ##STR00001## Pharmaceutical formulations and medicaments include the organic compound or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable carrier and may be prepared by mixing the organic compound or a pharmaceutically acceptable salt of the organic compound with a carrier and water. A method of treating a patient includes administering a pharmaceutical formulation or medicament according to the invention to a patient in need thereof.