preferred_name: 4-THIA-1-AZABICYCLO(3.2.0)HEPT-2-ENE-2-CARBOXYLIC ACID, 6-(1-(((1,1-DIMETHYLETHYL)DIMETHYLSILYL)OXY)ETHYL)-7-OXO-3-((TETRAHYDRO-1-OXIDO-3-THIENYL)THIO)-, 2-PROPENYL ESTER, (5R-(3(1R*,3S*),5.ALPHA.,6.BETA.(R*)))-