https://vocabularyserver.com/agrovoc/pt/https://vocabularyserver.com/agrovoc/pt/xml.php?skosTema=15420Xilazina https://vocabularyserver.com/agrovoc/pt/xml.php?skosTema=15420 AnalgĂ©sico BT https://vocabularyserver.com/agrovoc/pt/xml.php?skosTema=15420 Composto heterocĂclico BT