butanol article 12 alcohol 8 unclassified drug 8 Support, Non-U.S. Gov't 6 controlled study 6 in vitro study 6 nonhuman 6 1-Butanol 4 Brazil 4 Enzymes, Immobilized 4 Erythrocytes 4 Human 4 Porphobilinogen Synthase 4 Thiosulfate Sulfurtransferase 4 blood and hemopoietic system 4 chloroform 4 drug structure 4 enzyme purification 4 erythrocyte 4 human cell 4 normal human 4 porphobilinogen synthase 4 preliminary communication 4 synthesis 4 water 4 (3 hydroxypropyl)ester 2 1,8 diazabicyclo[5.4.0]undec 7 ene 2 3 (3,4 dicyano phenoxy) propyl ester 2 3alpha,7alpha,12alpha triacetoxy 5beta cholanic acid 2