Ethyl 1′-methyl-2-oxo-4′-[(3aR,5R,5aS,8aS,8bR)-2,2,7,7-tetra­methyl­tetra­hydro-3aH-bis­[1,3]dioxolo[4,5-b:4′,5′-d]pyran-5-yl]-2H-spiro­[ace­naphthyl­ene-1,2′-pyrrolidine]-3′-carboxyl­ate

In the title mol­ecule, C₃₀H₃₅NO₈, the ace­naphthyl­enone moiety, two atoms of a methyl pyrrolidine ring (N and C atoms) and four atoms of an ethyl acetate moiety (two C and two O atoms) are disordered over two sets of sites in ratio 0.532 (7):0.468 (7). The three C atoms of a di­meth­oxy­ethane ring and dioxolane ring attached with two methyl groups are disordered over two sets of sites in 0.66 (2):0.34 (2) and 0.62 (2):0.38 (2) ratios, respectively. The major and minor components of the ace­naphthyl­ene ring are essentially planar (r.m.s. deviations = 0.0254 and 0.0436 Å, respectively). The major and minor components of the pyrrolidine ring adopt C-envelope conformations with C atoms displaced by 0.492 (11) and 0.595 (7) Å from the remaining ring atoms. One of the dioxolane rings is disordered with its major component in an envelope conformation [C displaced by 0.511 (11) Å] and the minor fraction is more or less planar with an r.m.s. deviation of 0.070 Å. The other dioxolane ring is in an envelope conformation, with a C atom displaced by 0.438 (3) Å from the remainder of the ring atoms. The crystal packing features C—H...O inter­actions, which generate C(9) chains.

Methyl 9-hy­droxy-15-methyl-2-oxo-11-(pyren-1-yl)-10-oxa-15-aza­tetra­cyclo­[7.6.0.0^1,12.0^3,8]penta­deca-3(8),4,6-triene-12-carboxyl­ate

In the title compound, C₃₂H₂₅NO₅, the furan and pyrrole rings each adopt an envelope conformation, the respective flap atoms being the C atom bearing the pyrene substituent and the CH₂ atom adjacent to the N atom. The mol­ecular conformation is stabilized by an intra­molecular O—H...N hydrogen bond. In the crystal, C—H...O contacts link the mol­ecules, forming a two-dimensional network parallel to (001).

Methyl 8-bromo-3-[1-(4-meth­oxy­phen­yl)-4-oxo-3-phenyl­azetidin-2-yl]-1-methyl-1,2,3,3a,4,9b-hexa­hydro­chromeno[4,3-b]pyrrole-3a-carboxyl­ate

In the title compound, C₃₀H₂₉BrN₂O₅, the β-lactam ring is essentially planar, with the O atom displaced from this plane by 0.856 (9) Å, and forming dihedral angles of 24.35 (13) and 89.42 (14)° with the planes of the benzene substituent groups on this ring. The tetra­hydro­pyran ring adopts an envelope conformation with the C atom bearing the β-lactam ring as the flap. In the crystal, weak C—H...O hydrogen bonds with carboxyl and tetra­hydro­pyran O-atom acceptors give rise to a chain structure extending along the b-axis direction.