5α,8α-Epidioxysterols from the tunicate Didemnum salary
Résumé
Five α,8α-epidioxysterols were isolated and identified from the tunicate Didemnum salary. The relative quantification of the compds. obtained was 5α,8α-epidioxycholest-6-en-3β-ol (50%), 5α,8α-epidioxy-24(S)-methylcholest-6-en-3β-ol + 5α,8α-epidioxy-24(R)-methylcholest-6-en-3β-ol (30%), and 5α,8α-epidioxy-24(S)-ethylcholest-6-en-3β-ol + 5α,8α-epidioxy-24(R)-ethylcholest-6-en-3β-ol (20%). [on SciFinder(R)]