Abstract: Provided are a bisphenol represented by the general formula (1), a method for producing the bisphenol, and a polyarylate resin, a (meth)acrylate compound and an epoxy resin which are derived from the bisphenol. In the formula (1), R1 to R4 are the same or different, and each represent an alkyl group, an aryl group or a halogen atom, n1 and n2 are the same or different, and each represent an integer of 1 to 4, and k1 to k4 are the same or different, and each represent 0 or an integer of 1 to 4. When at least one of k1 to k4 is 2 or more, corresponding R1 to R4 may be the same or different.

Abstract: Provided are a bisphenol represented by the general formula (1), a method for producing the bisphenol, and a polyarylate resin, a (meth)acrylate compound and an epoxy resin which are derived from the bisphenol. In the formula (1), R1 to R4 are the same or different, and each represent an alkyl group, an aryl group or a halogen atom, n1 and n2 are the same or different, and each represent an integer of 1 to 4, and k1 to k4 are the same or different, and each represent 0 or an integer of 1 to 4. When at least one of k1 to k4 is 2 or more, corresponding R1 to R4 may be the same or different.

Abstract: A highly stable crystal of (1S)-1,5-anhydro-1-[5-(4-{(1E)-4-[(1-{[2-(dimethylamino)ethyl]amino}-2-methyl-1-oxopropan-2-yl)amino]-3,3-dimethyl-4-oxobut-1-en-1-yl}benzyl)-2-methoxy-4-(propan-2-yl)phenyl]-D-glucitol, and a process for producing the crystal are provided. Specifically, an ethanolate having the following physical properties, and a plurality of other crystal forms transformed from the ethanolate are provided: (a) Having peaks at 2?=5.9 degrees, 17.1 degrees, 17.6 degrees and 21.5 degrees in X-ray powder diffraction (Cu—K?); (b) Showing characteristic absorption bands at 3538 cm?1, 3357 cm?1, 2964 cm?1, 1673 cm?1, 1634 cm?1 and 1505 cm?1 in an infrared absorption spectrum; and (c) Having a melting point in a vicinity of 111° C.

Abstract: A highly stable crystal of (1S)-1,5-anhydro-1-[5-(4-{(1E)-4-[(1-{[2-(dimethylamino)ethyl]amino}-2-methyl-1-oxopropan-2-yl)amino]-3,3-dimethyl-4-oxobut-1-en-1-yl}benzyl)-2-methoxy-4-(propan-2-yl)phenyl]-D-glucitol, and a process for producing the crystal are provided. Specifically, an ethanolate having the following physical properties, and a plurality of other crystal forms transformed from the ethanolate are provided: (a) Having peaks at 2?=5.9 degrees, 17.1 degrees, 17.6 degrees and 21.5 degrees in X-ray powder diffraction (Cu—K?); (b) Showing characteristic absorption bands at 3538 cm?1, 3357 cm?1, 2964 cm?1, 1673 cm?1, 1634 cm?1 and 1505 cm?1 in an infrared absorption spectrum; and (c) Having a melting point in a vicinity of 111° C.