response to choline as choline h2 citrate , choline bitartrate , and choline chloride was negative above 10 ( -7 ) m , but response to the choline analog carbachol was positve ( greater tendency to attach ) in the range 5 x 10 ( -6 ) to 5 x 10 ( -4 ) m .
C0008405
choline
C0008408
choline bitartrate