6 -(D-2-[4-hydroxy-1,5-naphthyridine-3-carboxamido]-2-[4-hydroxy

6 -Halo-7,8-dimethoxy-1-(methoxyphenyl)-2,3,4,5-tetrahydro-1H-3-

6 Or 8 Haloallyl substituted 7-hydroxycoumarins

6'-Amino-spiro(cycloalkane-1,2'-penam)-3'-carboxylic acids

6(1-Piperazinyl), piperidino and (1(homopiperazinyl)11-cyanometh

6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl hexano

6(6-Substituted-2,5,7,8-tetramethyl-2-chromanyl)-3-methyl-4-hexe

6(R)-[2-(8-Hydroxy-2,6-dimethylpolyhydronaphthyl-1)-e thyl]-4(R)

6,11-Dihydro-11-oxo-dibenzo[b,e]thiepine-2-acetic acids

6,11-Dihydrodibenzo-[b. e.]-thiepin-11-one-3-aldehyde and 3-acet

6,11-Dihydrodibenzo-[b.e.]-thiepin-11-one-3-acetonitrile

6,11-Dihydrodibenzo-[b.e.]-thiepin-11-one-3-carboxaldehyde

6,11-Dihydrodibenzo-[b.e.]-thiepin-11-one-3-thioacetates

6,6,7-Trimethyl-tricyclo[5.2.2.0.sup.1,5 ]undec-8-en-2-one

6,6A-AND 6,7-Anhydroerythromycin B and derivatives thereof

6,7-Dichloro-3,4-dihydro-2H-pyrazino(2,3-B)(1,4)oxazines

6,7-Didehydro- or 7,8-didehydro-PGI.sub.1 acyl-substituted pheny

6,7-Disubstituted-5-(acyl)benzofuran-2-carboxylic acids

6,7-Methylenedioxy-1-(2,2,2-trifluoroethyl)-4(1H)-quinolone-3-ca

6,9-Oxido-9,10-secoestrane derivatives and method of synthesis