In both graph's there are only 1 vertex of degree 2 and 1 vertex of degree 6.
In picture 2 degree of vertex 1 is 2 and degree of vertex 7 is 6. And they are connecting by a path. Whereas in picture 1 vertex 1 has degree 6 and vertex 8 has degree 2, but they are not connecting by an edge.
In both graph's there are only 1 vertex of degree 2 and 1 vertex of degree 6.
In picture 2 degree of vertex 1 is 2 and degree of vertex 7 is 6. And they are connecting by a path. Whereas in picture 1 vertex 1 has degree 6 and vertex 8 has degree 2, but they are not connecting by an edge.
So these two are not isomorphic.