Is this a Fragment?

Fierce Biotech has a listing of the top 15 (potential) late stage blockbusters in development.  I think these lists Fierce put out are very interesting.  The last one on the list is alpharadin.  Its a potential treatment for bone metastases and Bayer just came up with data that it could also be a broad spectrum treatment for prostate cancer.  We typically don't discuss late stage development; so few of us have actually been there its like Oz.  What makes this so interesting to me is the chemical structure of alpharadin: radium-223 dichloride.  RaCl2.  Three atoms or 297 g/mol. 

I realize this is not a fragment in the true sense of what most of us do.  I found it fascinating nonetheless.