Trimethyl 3,3′,3′′-(benzene-1,3,5-tri­yl)tri­propyn­oate

In the title compound, C18H12O6, the alkyne bonds are distorted, featuring bond angles around the C—C≡C—C group of 173.6 (1)/179.0 (1), 178.1 (1)/178.4 (1) and 174.9 (1)/175.9 (1)°, and the ester groups make angles of 3.5 (1), 13.8 (1) and 14.5 (1)° with the central benzene ring. In the crystal, mol­ecules are connected in layers parallel to (131) by weak C—H⋯O hydrogen bonds, giving rise to a system of hydrogen-bonded ring motifs with graph sets R22(14) and R44(22). The layers are linked by C—H⋯O and C—H⋯π contacts.