(1S,9R)-12-(5-Hydroxy-2,4-dimethoxy-3-methyl-benzyl)-4,6-dimethoxy-5,13-dimethyl-11,13-diaza-tricyclo[7.3.1.02,7]trideca-2,4,6-trien-3-ol

(1R,9S,12S)-3-Benzyloxy-12-(5-benzyloxy-2,4-dimethoxy-3-methyl-benzyl)-4-hydroxy-6-methoxy-5-methyl-10-oxo-11,13-diaza-tricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxylic acid 2-methoxycarbonyl-ethyl ester

(2aS,4R,8bR)-1-Benzyl-5-hydroxy-6,8-dimethoxy-7-methyl-2-oxo-1,2,2a,3,4,8b-hexahydro-1,3-diaza-cyclobuta[a]naphthalene-4-carboxylic acid methyl ester

(2aS,4R,8bR)-1-Benzyl-5-benzyloxy-4-benzyloxymethyl-6,8-dimethoxy-7-methyl-2a,3,4,8b-tetrahydro-1H-1,3-diaza-cyclobuta[a]naphthalen-2-one