Chemical Structure	CAT No.	CAS	Item Group	Purity
	C4X-107731	N/A	Impurity
	Entecavir Impurity 31
	C4X-107732	142217-77-4	Impurity
	???????C4X-107760?Entecavir Impurity 32
	C4X-107733	110567-21-0	Impurity
	Entecavir Impurity 33
	C4X-107734	1354695-79-6	Impurity
	Entecavir Impurity 34
	C4X-107735	1354695-82-1	Impurity
	Entecavir Impurity 35
	C4X-107736	N/A	Impurity
	1R 3S 4R-Entecavir H2O
	C4X-107737	1367369-80-9?free base?	Impurity
	1S 3R 4R-Entecavir
	C4X-107741	N/A	Impurity
	Entecavir Impurity 41
	C4X-107742	N/A	Impurity
	Entecavir Impurity 42
	C4X-107743	N/A	Impurity
	Entecavir Impurity 43