Preferably, the fumaric acid derivative is/are those selected from the group consisting of fumaric acid dialkyl esters or fumaric acid monoalkyl esters in the form of {HEAD ~ the free acid} or {TAIL ~ a salt} thereof 
Preferably , the fumaric acid derivative is / are those selected from the group consisting of fumaric acid dialkyl esters or fumaric acid monoalkyl esters in the form of { HEAD ~ the free acid } or { TAIL ~ a salt } thereof
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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH