in the live animal after 5 h , the distribution of isotope from l- [ 14c ] carnitine and d- [ 3h ] carnitine differed primarily in the muscle where 29.5 % of the l-carnitine and 5.3 % of the d-carnitine was found and in the urine where 2.9 % of the l-carnitine and 7.1 % of the d-carnitine was found .
C0087163
l-carnitine
C0007258
carnitine