however , intestinal retention of purines ( 50 nmol dose ) was elevated with fasting ( 27.2 vs. 16.6 nmol/g for adenine , 5.7 vs. 3.0 nmol/g for guanine and 16.1 vs. 7.4 nmol/g for hypoxanthine , for fed vs. fasted , respectively ) .
C0034140
purines
C0001407
adenine