(8S,8aS)-3-[2-(1,1-dimethylallyl)-1-methoxymethyl-1H-3-indolyl(hydroxy)methyl]-8-methyl-2-methylsulfonylmethylperhydroazolo[1,2-a]pyrazine-1,4-dione

ethyl 2-amino-3-[2-(1,1-dimethylprop-2-enyl)-1-methoxymethyl-1H-indol-3-yl]-3-hydroxypropionate

(3Z)-1-acetyl-3-{[2-(1,1-dimethylprop-2-enyl)-1-methoxymethyl-1H-indol-3-yl]methylene}-6-methyl-2,5-piperazinedione

(R)-3-[1-[2-(1,1-Dimethyl-allyl)-1-methoxymethyl-1H-indol-3-yl]-meth-(Z)-ylidene]-6-methyl-1,4-bis-methylsulfanylmethyl-piperazine-2,5-dione

2-((S)-2-Allyloxycarbonylamino-propionylamino)-3-[2-(1,1-dimethyl-allyl)-1H-indol-3-yl]-3-hydroxy-propionic acid ethyl ester