ChEMBL

So, I cleaned up a few stragglers in terms of the classification of therapeutic class, and the data for the 551 discussed below is....

class	count
peptides and proteins	521
oligonucleotides	17
oligosaccharides	13

So this has pushed the fraction of protein/peptide biological INNs up to 95%. Here is a pretty graph.

Of course, the thing I should have done first of all, is to look at currently approved agents under the same classification scheme......