Total synthesis of (+/-)-n-2-(phenylsulfonyl)-cpi, (+/-)-cc-1065, (+)-cc-1065, ent-(-)-cc-1065, and the precise, functional agents (+/-)-cpi-cdpi2, (+)-cpi-cdpi2, and (-)-cpi-cdpi2 (+/-)-(3br-star,4as-star)-deoxy-cc-1065, (+)-(3br,4as)-deoxy-cc-1065, and (-)-(3bs,4ar)-deoxy-cc-1065