https://www.ncbi.nlm.nih.gov/Structure/pdb/4ABH
4ABH: Fragments bound to bovine trypsin for the SAMPL challenge
CATIONIC TRYPSIN1,2-ETHANEDIOL1-(3-PYRROLIDIN-1-YLPHENYL)METHANAMINECALCIUM IONDIMETHYL SULFOXIDESULFATE ION
for thefragmentsboundbovinetrypsin