Rolitetracycline
Abricycline, Pyrrolidinylmethyltetracycline, SQ 15659, Transcycline, Velacycline
Retapamulin
SB 275833
Roseoflavin
8-Dimethylaminoriboflavin, Roseoflavine
Radicinol
Roccellic acid
(+)-Roccellic acid, NSC 249985
Rubiginone D2
β-Rubromycin
Reserpiline
(-)-Reserpiline, Elliptamine, Reserpilin
Remisporine B