Method for producing diphenylmethane derivative

A crystalline form of a compound of the following Formula c28:

• wherein the crystalline form has an X-ray diffraction (XRD) spectrum which includes peaks at diffraction angles (2θ) of 7.0°±0.2°, 14.9°±0.2°, 17.7°±0.2°, 18.8°±0.2°, 20.6°±0.2°, 21.8°±0.2°, and 23.5°±0.2° in a case of being irradiated using a Cu—Kα light source.

A crystalline form of a compound of the following Formula c28:

• wherein the crystalline form has an X-ray diffraction (XRD) spectrum which includes peaks at diffraction angles (2θ) of 5.6°±0.2°, 7.3°±0.2°, 15.7°±0.2°, 17.2°±0.2°, 18.9°±0.2°, 21.2°±0.2°, and 21.9°±0.2° in a case of being irradiated using a Cu—Kα light source.

A crystalline form of a compound of the following Formula c28:

• wherein the crystalline form has an X-ray diffraction (XRD) spectrum which includes peaks at diffraction angles (2θ) of 5.5°±0.2°, 7.2°±0.2°, 15.3°±0.2°, 17.2°±0.2°, 17.6°±0.2°, 18.9°±0.2°, and 21.1°±0.2° in a case of being irradiated using a Cu—Kα light source.