Racemic 9,10-dimeth-oxy-3-methyl-6-phenyl-7,7a-dihydro-benzo[b]benzo[4,5]isothia-zolo[2,3-d][1,4]diazepine 12,12-dioxide.

There are two molecules in the asymmetric unit of the title compound, C(24)H(22)N(2)O(4)S. The conformation of the seven-membered ring is twisted boat for both molecules. The molecule is chiral, but crystal symmetry generates a recemate. The crystal packing is stabilized by weak intermolecular C-H⋯O hydrogen bonds.

(Z)-3-Chloro-methyl-idene-5,6-dimeth-oxy-2-methyl-2,3-dihydro-1,2-benzothia-zole 1,1-dioxide.

The title compound, C(11)H(12)ClNO(4)S, adopts a Z configuration about the C=C double bond. The benzisothia-zole system is essentially planar [maximum deviation of 0.235 (2) Šfor the S atom]. In the crystal, the mol-ecules stack parallel to each other in the b-axis direction, with inter-planar spacings for the benzene and thia-zole rings ranging from 3.402 (2) to 3.702 (2) Å.