Entity Information

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Economic entity name	Ra Pharmaceuticals, Inc.
CIK	0001481512
Accession number	0001047469-17-001292
Generator	Merrill
SEC filing page	http://www.sec.gov/Archives/edgar/data/1481512/000104746917001292/0001047469-17-001292-index.htm
XBRL Instance	http://www.sec.gov/Archives/edgar/data/1481512/000104746917001292/rarx-20161231.xml
XBRL Cloud Viewer	https://edgardashboard.xbrlcloud.com/flex/viewer/XBRLViewer.html#instance=http://www.sec.gov/Archives/edgar/data/1481512/000104746917001292/rarx-20161231.xml