8ξ-methyl-4,7,8ξ-triphenyl-(3ac,7ac)-3a,4,7,7a-tetrahydro-4r,7c-episilano-isobenzofuran-1,3-dione
(1R,2R,6S)-10-Methyl-1,7,10-triphenyl-4-oxa-10-sila-tricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
7-Methyl-1,4,7-triphenyl-7-sila-2-norbornen-5,6-dicarbonsaeureanhydrid
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