Natco Pharma Standalone December 2018 Net Sales at Rs 531.90 crore, down 1.55% Y-o-Yhttps://www.moneycontrol.com/news/business/earnings/natco-pharma-standalone-december-2018-net-sales-at-rs-531-90-crore-down-1-55-y-o-y-3524311.html#NAVNETEDUL