List of tensor names in graph in Tensorflow

The graph object in Tensorflow has a method called "get_tensor_by_name(name)". Is there anyway to get a list of valid tensor names?

If not, does anyone know the valid names for the pretrained model inception-v3 from here? From their example, pool_3, is one valid tensor but a list of all of them would be nice. I looked at the paper referred to and some of the layers seems to correspond to the sizes in table 1 but not all of them.