The Madagascar Periwinkle (IMAGE) John Innes Centre Caption John Innes Centre scientists have made a breakthrough in understanding how valuable anti-cancer compounds are produced in the Madagascar Periwinkle (Catharanthus roseus). Credit The John Innes Centre Usage Restrictions Please credit the John Innes Centre License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.