Answer: aspartame

AnswerCrossword Clue
ASPARTAMENutraSweet, basically
ASPARTAMEEqual, generically
ASPARTAMEResult of trying to invent anti-ulcer medication
ASPARTAMESweet stuff
ASPARTAMESugar substitute
ASPARTAMEEqual, essentially
ASPARTAMEWhat NutraSweet is a brand of
aspartamelow-calorie sugar substitute