Preferred for {HEAD ~ the organic acid} is at least one selected from among oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, maleic acid, fumaric acid, phthalic acid, malic acid, {TAIL ~ tartaric acid} and citric acid 
Preferred for { HEAD ~ the organic acid } is at least one selected from among oxalic acid , malonic acid , succinic acid , glutaric acid , adipic acid , maleic acid , fumaric acid , phthalic acid , malic acid , { TAIL ~ tartaric acid } and citric acid
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH