Collect. Czech. Chem. Commun.
1967, 32, 2377-2380
https://doi.org/10.1135/cccc19672377
Synthesis of 6,6-dimethyl-6H-pyrano[3,2-b:5,6-b']bis[1]benzothiophene
N. Kucharczyk, V. Horák and M. Semonský
Collect. Czech. Chem. Commun.
1967, 32, 2377-2380
https://doi.org/10.1135/cccc19672377