title: Ethyl 2-amino-4-(4-methyl-1,3-thia-zol-5-yl)-5-oxo-4H,5H-pyrano[3,2-c]chromene-3-carboxyl-ate.
abstract: There are two independent mol-ecules in the asymmetric unit of the title compound, C19H16N2O5S, in which the thia-zole rings make dihedral angles of 80.89 (11) and 84.81 (11)° with the pyrano[3,2-c]chromene ring systems. An intra-molecular N-H⋯O hydrogen bond involving the amino group occurs in each independent mol-ecule. In the crystal, the amino groups are involved in N-H⋯O and N-H⋯N hydrogen bonds.
authors.affiliation: Department of Chemistry, Madras Christian College, Tambaram, Chennai 600 059, Tamil Nadu, India.
authors.forename: V
authors.initials: V
authors.lastname: Karthikeyan
authors.affiliation: Department of Chemistry, IIT Madras, Chennai 600 036, Tamil Nadu, India.
authors.forename: V
authors.initials: V
authors.lastname: Ramkumar
authors.affiliation: Department of Chemistry, Madras Christian College, Tambaram, Chennai 600 059, Tamil Nadu, India.
authors.forename: R Joel
authors.initials: RJ
authors.lastname: Karunakaran