(S)-1,5-Dioxo-1,3,3a,6,7,8-hexahydro-2-oxa-4,5a-diaza-as-indacene-4-carboxylic acid benzyl ester

(R)-1-Methoxy-3-(9-triisopropylsilanyloxy-nonyl)-3,5,6,7-tetrahydro-pyrrolo[1,2-c]pyrimidine-4-carboxylic acid methyl ester