(1S)-1-(羟基甲基)-5,7-二甲基-4-(苯基甲基)-2,3-二硫杂-5,7-二氮杂双环[2.2.2]辛烷-6,8-二酮

1,4-dimethyl-2,5-piperazinedione-3,6-disulfide

1,4-dimethyl-3-(2'-thiopyridyl)-6-(dimethylmalonyl)-2,5-piperazinedione (anti)

1,4-dimethyl-3-(2'-thiopyridyl)-6-(dimethylmalonyl)-2,5-piperazinedione (syn)

(3S,6R)-3-Allyl-3,6-dimethoxy-1,4-dimethyl-piperazine-2,5-dione