Gabapentin EP Impurity - A

3,3-Pentamethylene-4-butyrolactam; Gabapentin Lactam; 2-Aza-spiro[4.5]decan-3-one; Gabapentin Impurity A (IP); 2-Azaspiro[4.5]decan-3-one; Gabapentin Related Compound A (USP);