. " phenoxy, naphthoxy, etc., lower alkyl having one to eight carbon atoms, e.g., methyl, ethyl, propyl, butyl, etc., m. alkaryl, e.g., tolyl, ethyl phenyl, propyl naphthyl, etc.; wherein R and R are the same or different including hydrogen, lower alkyl having one to eight carbon atoms such as ethyl, propyl, butyl, etc., aryl such as phenyl, naphthyl, etc., halogen e.g. chlorine, bromine, etc.; p. su" . . .