11-Hy­droxy-9-[1-(4-methyl­phen­yl)-4-oxo-3-phenyl­azetidin-2-yl]-18-oxo-10-oxa-2-aza­penta­cyclo­[9.7.0.0^1,8.0^2,6.0^12,17]octa­deca-12,14,16-triene-8-carbonitrile

In the title compound, C₃₃H₂₉N₃O₅, the four-membered ring of the β-lactam fragment is essentially planar (r.m.s. deviation = 0.0122 Å), with the carbonyl O atom displaced from this ring by 0.856 (9) Å. The mean planes of the meth­oxy­phenyl and phenyl rings are inclined at dihedral angles 85.10 (7) and 21.56 (14)°, respectively, with respect to the mean plane of the four-membered ring. The pyrrolidine rings adopt envelope conformations with C atoms lying 0.535 (4) and 0.519 (4) Å out of the planes formed by the remaining ring atoms. The furan ring also adopts an envelope conformation with a C atom 0.560 (3) Å out of the plane formed by the remaining ring atoms. The nine-membered indene ring is almost planar (r.m.s. deviation = 0.0240 Å), with the carbonyl O atom displaced by 0.145 (3) Å from this ring. The mol­ecular structure is stabilized by a strong intra­molecular O—H...N hydrogen bond and the crystal structure is consolidated by C—H...O hydrogen bonds.

Methyl 12-hydroxy-10-[1-(4-meth­oxy­phen­yl)-2-oxo-3-phen­oxy­azetidin-4-yl]-11-oxa-3-aza­hexa­cyclo­[11.7.1.0^2,9.0^2,12.0^3,7.0^17,21]henicosa-1(20),13,15,17(21),18-penta­ene-9-carboxyl­ate

In the title compound, C₃₇H₃₄N₂O₇, both pyrrolidine rings adopt envelope conformations. The β-lactam ring is close to planar (r.m.s. deviation = 0.0395 Å) and makes a dihedral angle of 83.35 (15)° with the furan ring. The O atom attached to the β-lactam ring deviates by 0.187 (2) Å from the mean plane of the ring. The β-lactam ring makes dihedral angles of 14.90 (15) and 27.72 (17)° with the meth­oxy­phenyl and phenyl rings, respectively. The crystal packing features C—H...O hydrogen bonds.