r1 may have includes for example thiophene furan pyran pyridine pyrrole pyrazine azepine azosine azonine azesine oxazole thiazole pyrimidine pyridazine triazine triazole tetrazole imidazole pyrazole morpholine thiomorpholine piperidine piperazine quinoline isoquinoline indole isoindole quinoxaline phthalazine quinolizine quinazoline quinoxaline naphthyridine chromene benzofuran and benzothiophene preferably the hetero ring is a 5 membered or 6 membered hetero ring the alkoxyalkyl group as the substituted alkyl group in r1 includes for example methoxyethyl ethoxyethyl methoxypropyl methoxyhexyl ethoxyoctyl butoxyhexadecyl and methoxyoctadecyl the substituted aminomethyl group in r1 includes for example n methylaminomethyl n ethylaminomethyl n hexylaminomethyl n phenylaminomethyl n n dimethylaminomethyl n n diethylaminomethyl n n dioctylaminomethyl and n n diphenylaminomethyl the substituted thiomethyl group as r1 includes for example methylthiomethyl butylthiomethyl dodecylthiomethyl and phenylthiomethyl the alkenyl group as r1 includes for example linear branched or cyclic alkenyl groups such as vinyl allyl propenyl butenyl pentenyl hexenyl heptenyl octenyl nonenyl decenyl undecenyl dodecenyl tridecenyl tetradecenyl pentadecenyl hexadecenyl heptadecenyl octadecenyl nonadecenyl icosenyl hexadienyl and dodecatrienyl the alkenyl group as r1 preferably has 2 to 20 carbon atoms the alkoxy group as r1 includes for example methoxy ethoxy propoxy butoxy pentyloxy hexyloxy heptyloxy octyloxy nonyloxy decyloxy dodecyloxy and octadecyloxy the alkoxy group as r1 preferably has one to 20 carbon atoms the aryloxy group in r1 includes for example phenoxy and naphthyloxy the substituted carbonyl group in r1 includes for example acetyl propanoyl butanoyl pentanoyl hexanoyl heptanoyl benzoyl and naphthoyl the substituted sulfonyl group as r1 includes for example methylsulfonyl ethylsulfonyl propylsulfonyl butylsulfonyl pentylsulfonyl hexylsulfonyl heptylsulfonyl octylsulfonyl phenylsulfonyl and naphthylsulfonyl the monosubstituted carbamoyl group in r1 includes monosubstituted carbamoyl groups substituted with one group for example n methylcarbamoyl n tert butyl carbamoyl n dodecylcarbamoyl and n phenylcarbamoyl the monosubstituted sulfamoyl group in r1 includes monosubstituted sulfamoyl groups substituted with one group.