.beta.,.beta.-Chlorinated and brominated ethers

.beta.,.beta.-Dicyano styrenes

.beta.-Acyloxy-crotonic acid amide-N-sulfohalides and a process

.beta.-Adrenergic blocking agents in the 1,2,3-thiadiazole serie

.beta.-Aminopenicillins, salts and esters

.beta.-Carbonylpolyfluoroalkyl sulfonate esters

.beta.-Crystalline form of the pigment obtained by coupling diaz

.beta.-D-glucosyluronic acid derivatives

.beta.-Endorphin analog

.beta.-Endorphin analogs

.beta.-Galactosyl-umbelliferone-labeled protein and polypeptide

.beta.-Galactosyl-umbelliferone-labeled protein and polypeptide

.beta.-Halogenoethyl-silanes as plant growth regulators

.beta.-hydroxy-.gamma.-ketoester flavorant-release additives

.beta.-Hydroxycyclopentylperoxide compounds and the use thereof

.beta.-Ketocarboxyl and phosphonate dihydro-chalcone sweeteners

.beta.-Lactam antibacterial agents

.beta.-Lactam antibiotic esterification process using methoxymet

.beta.-Lactam antibiotics

.beta.-Lactam antibiotics