4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenoxyacetyl)amino)-, (2S-(2alpha,5alpha,6beta))-, compd. with (4S-(4alpha,4aalpha,5aalpha,6beta,12aalpha))-4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,6,10,12,12a-pentahydroxy-N-((4-(2-hydroxyethyl)-1-piperazinyl)methyl)-6-methyl-1,11-dioxo-2-naphthacenecarboxamide (1:1), mixt. with bromelain juice