If you choose a supplement you can enroll in a Blue Medicare Rx Plan to cover your prescription drugs. To compare plan premiums in your area check out the official Medicare site and enter you State and County to search for Blue Medicare PPO or other Medicare Advantage Plans offered by Blue Cross Blue Shield.
An acetal is a functional group with the following connectivity R 2 C(OR') 2, where both R' groups are organic fragments. The central carbon atom has four bonds to it, and is therefore saturated and has tetrahedral geometry.
The plastic known as acetal is a polyacetal of formaldehyde. Acetals are used as protecting groups for carbonyl groups in organic synthesis as they are stable with respect to hydrolysis by bases and with respect to many oxidizing and reducing agents.