[(1S,2R)-10-(N,N-dicyclohexylaminosulfonyl)born-2-yl] isovalerate

1-((2R,5S)-5-isopropyl-3,6-dimethoxy-2,5-dihydropyrazin-2-yl)-2-((2S,5S)-5-isopropyl-3,6-dimethoxy-2,5-dihydropyrazin-2-yl)ethane

(6S,3Z)-N-1-(4-methoxybenzyl)-3-isobutylidene-6-isopropyl-piperazine-2,5-dione

(3S)-N-1-(tert-butoxycarbonyl)-N-4-(4-methoxybenzyl)-3-isopropyl-piperazine-2,5-dione

(3S,6S)-3-chloro-6-isopropyl-1,4-bis(4-methoxybenzyl)piperazine-2,5-dione