Provided are compounds with a donor moiety, a first acceptor moiety and a second acceptor moiety, as shown by Formula :With the unique molecular design, compounds of Formula can provide a desirable power conversion efficiency. Catheters are provided that can be advanced over single length guide wires and which can be retracted over single length wire shafts of distal embolic protection devices. The first input key generates a first signal when the first input key is turned.