Thielavin B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion of PGH2 to PGE2 in B is a fungal metabolite that contains O-substituted salicylic acid. It inhibits cyclooxygenase, blocking both the conversion of arachidonic acid to Prostaglandin H2 (PGH2) and the conversion