abetimus abetimus abetimus (trade name riquent) is an immunosuppressant. it is a synthetic biological called a tolerogen. it is made of four double-stranded oligodeoxyribonucleotides that are attached to a carrier platform and are designed to block specific b-cell anti double stranded dna antibodies. it may also complex anti dsdna antibodies together, therefore disabling them. this way abetimus was supposed to help treat systemic lupus erythematosus and specifically lupus nephritis. abetimus sodiumclinical datatrade namesriquentatc codel04aa22 (who) identifierscas number169147-32-4 npubchem sid17397358chemspidernoneuniif5y7739g6ukeggd03204 nchemical and physical dataformulac1632h1944n610na156o970p156s4molar mass54171.35 g·mol−1 ny (what is this?) (verify) it was developed by la jolla pharmaceutical, who applied for marketing authorisations in the mid-2000s, but the drug was never marketed in the us or in europe.