(2R,5S)-2-(4-bromobutyl)-2,5-dihydro-5-isopropyl-3,6-dimethoxy-2-methylpyrazine

(3S,6R)-6-t-Butylthiomethyl-3-isopropyl-2,5-dimethoxy-6-methyl-3,6-dihydropyrazine

(3S,6R)-6-Benzylthiomethyl-3-isopropyl-2,5-dimethoxy-6-methyl-3,6-dihydropyrazine

(2R,5S)-2-<(1-Aziridinyl)phenylmethyl>-2,5-dihydro-5-isopropyl-3,6-dimethoxy-2-methylpyrazine

(2R,5S)-2,5-dihydro-5-isopropyl-2-<2-(isopropylidenaminooxy)ethyl>-3,6-dimethoxy-2-methylpyrazine