API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Quetiapine

Quetiapine Metabolite

Dibenzo-(1,4)-thiazepine-11(10H)-one Quetiapine-Metabolite
Quetiapine

Quetiapine Impurity A

11-(1-piperazinyl)dibenzo-(1,4)-thiazepine Quetiapine-Quetiapine-Impurity-A
Quetiapine

Quetiapine Hydroxy Impurity

2-(4-Dibenzo[b,f]-[1,4]-thiazepine-11-yl-1-piperzinyl)ethanol hemifumarate Quetiapine-Hydroxy-Impurity