“…A series of adducts containing bicycle [3.3.1]nonane skeleton, closely related to the title molecule, has been synthesized in our laboratory (Gnanadoss & Kalaivani, 1985). We have recently reported the structures of two such bicyclic molecules derived from 1,3,5-trinitrobenzene, ethyl 2-benzyl-3-oxobutanoate / ethyl 2(4-nitrophenylmethyl)-3-oxobutanoate and triethylamine (Balasubramani et al, 2011). In this article we report the crystal structure of the title compound ( Fig.…”