The present invention relates to compounds of the formula in which the variables G, W, Q, X, Y, B1, B2, Z1, Z2, and R1-R7 are as defined herein, methods for the preparation of the derivatives and intermediates thereof. The system including an electric vehicle supply equipment having an electrical plug compatible with a Level I or Level II power outlet, the plug connected to a power cord. Each health monitoring sensor node includes sensor elements positioned to sense parameters of the structure and to provide data related to the parameters to a health monitoring sensor node interrogator.