Read the 2 documents below - you should be all set.
Basically the MAIN claim "cope-1 with lower mol weight is less toxic" is the main one...there are various supporting claims around, either specifications, processes for making it, etc
Inequitable conduct case is very strong IMHO
They also have a decent case on indefiniteness i think...whether the info presented in the patents were definite enough so anybody skilled in the art could use it.
process patents seems like can be avoiding as MNTA may have non-infringing process