. . . "experimental"@en . . . . . . . . . . . . . . . . . "A phosphodiesterase inhibitor with antidepressant properties. [PubChem]"@en . . . . . . . . . . . . "4-[3-(Cyclopentyloxy)-4-Methoxyphenyl]-2-Pyrrolidinone"@en . . . . . . "61413-54-5"@en . .