FURO[3',4':6,7]NAPHTHO[2,3-D]-1,3-DIOXOL-6(5AH)-ONE, 9-[(4-FLUOROPHENYL)AMINO]-5,8,8A,9-TETRAHYDRO-5-(3,4,5-TRIMETHOXYPHENYL)-, (5R,5AR,8AS,9S)-