urolithins which have unknown biological activity in vivo. [ 40 ] [ 41 ] The different punicalagins present in P. granatum are granatin A and B , punicacortein A , B , C and D , 5-O-galloylpunicacortein D , punicafolin , punigluconin , punicalagin , 1-alpha-O-galloylpunicalagin , punicalin and 2-O-galloyl-punicalin .