a total of 45 normal or enlarged thyroid glands of adult slaughter cattle were weighed and analyzed by thin-layer chromatography for the presence of residues of the following thyreostatic compounds : thiouracil , methylthiouracil , propylthiouracil , phenylthiouracil , and methimazole .
C0039957
thiouracil
C0025830
methylthiouracil