Studies on chemical constituents of marine bryozoan Bugula neritina L

Seven compounds were isolated from the marine bryozoan Bugula neritina L.Their chemical structures were identified by NMR and MS spectroscopies as follows: cholesterol(Ⅰ),cholest-4-en-3-one(Ⅱ),cholesteryl myristate(Ⅲ),3β,5α,9α-trihydroxy-(22E,24R)-ergosta-7,22-dien-6-one(Ⅳ),3β,5α,6β-trihydroxy-(22E,24R)-ergosta-7,22-dien(Ⅴ),uracil(Ⅵ),thymine(Ⅶ).CompoundsⅡ-Ⅶ were isolated from Bugula neritina L.for the first time.