HealthCare Royalty Partners II LP closed an $80 million financing with privately held Nuron Biotech Inc. that included a $30 million equity investment and a $50 million synthetic royalty agreement linked to future sales of Meningitec, a vaccine Nuron acquired earlier this month from Pfizer Inc., and its HibTiter vaccine (Haemophilus b conjugate vaccine [diphtheria CRM197 protein conjugate]).