Nucleosides isolated from a Caribbean sponge, Cryptotethya crypta, were the basis for the synthesis of Aciclovir.
Yep!
Aciclovir is used to treat infections caused by viruses, such as herpes simplex virus (which causes cold sores around your mouth and genital herpes) and varicella zoster (which causes chickenpox and shingles). It works by stopping the growth of the viruses that cause the infection. Aciclovir reduces the severity of the infection and stops it from spreading. It helps the infection heal faster and lessens pain and itching.
This is a very good example of the healing power of the ocean.