On Thu, 14 Mar 2019 13:19:00 -0600
Phuong Chau <pc...@smith.edu> wrote:

> Could anyone tell me any possible solution to solve this problem?

1. Go to ligand expo search @ http://ligand-expo.rcsb.org/ld-search.html

2. Search for UNL and consider the topology of an "unknown ligand".

The solution is to fiter your substances to ones that are actually
known.
-- 
Dmitri Maziuk <dmaz...@bmrb.wisc.edu>


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