(2R,5S,2'R)-5-(2-acetoxy-3-butenyl)-5-(3-butenyl)-2,5-dihydro-3,6-dimethoxy-2-isopropylpyrazine

(2R,5S)-5-(4-acetoxy-2-butynyl)-5-(3-butenyl)-2,5-dihydro-3,6-dimethoxy-n-2-isopropylpyrazine

(3R,6R)-3-isopropyl-2,5-dimethoxy-9-methyl-1,4-diazaspiro[5.5]undeca-1,4,8-trien-7-one

(2'S,5'R)-1-[2-(3-butenyl)-5-isopropyl-3,6-dimethoxy-2,5-dihydropyrazin-2-yl]propan-2-one

(2'S,5'R)-4-[5-isopropyl-3,6-dimethoxy-2-(2-oxopropyl)-2,5-dihydropyrazin-2-yl]butan-2-one