- Synthesis and anticonvulsant activities of 3,3-dialkyl- and 3-alkyl-3-benzyl-2-piperidinones (delta-valerolactams) and hexahydro-2H-azepin-2-ones (epsilon-caprolactams). Reddy, P.A., Woodward, K.E., McIlheran, S.M., Hsiang, B.C., Latifi, T.N., Hill, M.W., Rothman, S.M., Ferrendelli, J.A., Covey, D.F. J. Med. Chem. (1997)